diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index e637f8c..add35ef 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -6,7 +6,7 @@ on:
     paths:
       - 'keymap/**'
       - 'QMK'
-      - 'shell.nix'
+      - '**/*.nix'
       - '.github/workflows/check.yml'
   workflow_dispatch: {}
 
@@ -21,14 +21,14 @@ jobs:
           submodules: recursive
           path: ./repo
 
-      - name: Set up Nix
+      - name: "Nix: set up"
         uses: cachix/install-nix-action@v15
         with:
           nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: |
             experimental-features = nix-command
 
-      - name: Set up cache
+      - name: "Nix: cache set up"
         uses: cachix/cachix-action@v10
         with:
           name: kip93
@@ -36,111 +36,72 @@ jobs:
           extraPullNames: nix-community
           skipPush: true
 
-      - name: Print nixpkgs version
+      - name: "Nix: version"
         run: |
           nix-instantiate --eval -E '"nixpkgs version: ${(import <nixpkgs> {}).lib.version}"'
+          nix-env --version
 
-      - name: Shellcheck shell.nix
-        id: shellcheck
+      - name: "Nix: format"
+        id: nix-format
         working-directory: ./repo
         run: |
-          (
-            printf '#!/bin/bash\n' ;
-            nix-shell --pure shell.nix --run : >/dev/null ;
-            nix-instantiate shell.nix 2>/dev/null | xargs -i sed '1,5d' {} ;
-          ) | nix-shell -p shellcheck --run 'shellcheck -'
+          nix-build scripts/nix-format.nix | xargs sh -c
         continue-on-error: true
 
-      - name: QMK Format
-        id: qmk-format
+      - name: "Nix: lint"
+        id: nix-lint
         working-directory: ./repo
         run: |
-          nix-shell --run format
-          git diff --exit-code --name-only
+          nix-build scripts/nix-lint.nix | xargs sh -c
         continue-on-error: true
 
-      - name: QMK Lint
-        id: qmk-lint
+      - name: "Nix: shellcheck"
+        id: nix-shellcheck
         working-directory: ./repo
         run: |
-          nix-shell --run lint
+          nix-build scripts/nix-shellcheck.nix | xargs sh -c
         continue-on-error: true
 
-      - name: Check shell.nix format
-        id: nixpkgs-fmt
+      - name: "Nix: vulnerabilities"
+        id: nix-vulnerabilities
         working-directory: ./repo
         run: |
-          nix-shell -p nixpkgs-fmt --run 'nixpkgs-fmt --check shell.nix'
+          nix-build scripts/nix-vulnerabilities.nix | xargs sh -c
         continue-on-error: true
 
-      - name: Lint shell.nix
-        id: nix-linter
+      - name: "Nix: logic"
+        id: nix-logic
         working-directory: ./repo
         run: |
-          nix-shell -p nix-linter --run ' \
-            nix-linter -W no-AlphabeticalArgs \
-                       -W no-AlphabeticalBindings \
-                       -W BetaReduction \
-                       -W DIYInherit \
-                       -W EmptyInherit \
-                       -W EmptyLet \
-                       -W no-EmptyVariadicParamSet \
-                       -W FreeLetInFunc \
-                       -W LetInInheritRecset \
-                       -W no-ListLiteralConcat \
-                       -W NegateAtom \
-                       -W SequentialLet \
-                       -W SetLiteralUpdate \
-                       -W UnfortunateArgName \
-                       -W no-UnneededAntiquote \
-                       -W UnneededRec \
-                       -W UnusedArg \
-                       -W UnusedLetBind \
-                       -W UpdateEmptySet \
-                       -v shell.nix \
-          '
+          nix-build scripts/nix-logic.nix | TMPDIR=../tmp xargs sh -c
         continue-on-error: true
 
-      - name: Check shell.nix for vulnerabilities
-        id: vulnix
+      - name: "QMK: format"
+        id: qmk-format
         working-directory: ./repo
         run: |
-          nix-shell -p vulnix --run 'vulnix -f shell.nix'
+          nix-build scripts/qmk-format.nix | xargs sh -c
         continue-on-error: true
 
-      - name: Validate shell.nix logic
-        id: validate
-        working-directory: .
+      - name: "QMK: lint"
+        id: qmk-lint
+        working-directory: ./repo
         run: |
-          (
-            mkdir -p ./tmp ;
-            cp ./repo/shell.nix ./tmp/shell.nix ;
-            sed -i -E 's|\bKEYBOARD\b\s*=\s*".+?"\s*;|KEYBOARD = "ergodox_ez";|' ./tmp/shell.nix ;
-            cd ./tmp ;
-            MANPAGER=cat nix-shell --run help ;
-            nix-shell --pure --run init ;
-            # nix-shell --pure --run setup ;  # No root access, but not needed since we won't be flashing
-            nix-shell --pure --run format ;
-            nix-shell --pure --run lint ;
-            nix-shell --pure --run compile ;
-            # nix-shell --pure --run flash ;  # Can't flash since there is no keyboard attached
-            nix-shell --pure --run clean ;
-          )
+          nix-build scripts/qmk-lint.nix | xargs sh -c
         continue-on-error: true
 
       - name: Check for failures
         if: |
-          steps.shellcheck.outcome  != 'success' ||
-          steps.qmk-format.outcome  != 'success' ||
-          steps.qmk-lint.outcome    != 'success' ||
-          steps.nixpkgs-fmt.outcome != 'success' ||
-          steps.nix-linter.outcome  != 'success' ||
-          steps.vulnix.outcome      != 'success' ||
-          steps.validate.outcome    != 'success'
+          steps.nix-format.outcome          != 'success' ||
+          steps.nix-lint.outcome            != 'success' ||
+          steps.nix-shellcheck.outcome      != 'success' ||
+          steps.nix-vulnerabilities.outcome != 'success' ||
+          steps.nix-logic.outcome           != 'success' ||
+          steps.qmk-format.outcome          != 'success' ||
+          steps.qmk-lint.outcome            != 'success'
         run: exit 1
 
       - name: Push to cache
         working-directory: ./repo
         run: |
-          nix-shell --pure shell.nix --run :
-          nix-store -qR --include-outputs $(nix-instantiate shell.nix 2>/dev/null) | cachix push kip93
+          nix-build scripts/nix-cache.nix | xargs -I{} sh -c '{}' kip93
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index fd87e52..c2ce322 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -99,6 +99,4 @@ jobs:
 
       - name: Push to cache
         run: |
-          nix-shell --pure shell.nix --run :
-          nix-shell --pure QMK/shell.nix --run :
-          nix-store -qR --include-outputs $(nix-instantiate shell.nix QMK/shell.nix 2>/dev/null) | cachix push kip93
+          nix-build scripts/nix-cache.nix | xargs -I{} sh -c '{}' kip93
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index a618e97..f746173 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -55,5 +55,4 @@ jobs:
 
       - name: Push to cache
         run: |
-          nix-shell --pure QMK/shell.nix --run :
-          nix-store -qR --include-outputs $(nix-instantiate QMK/shell.nix 2>/dev/null) | cachix push kip93
+          nix-build scripts/nix-cache.nix | xargs -I{} sh -c '{}' kip93
diff --git a/.gitignore b/.gitignore
index c92e01d..6f48e5d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 /**/*[~#]
 /**/.*
+/**/result
+/**/result-*
 !/**/.github
 !/**/.gitignore
 !/**/.vscode
diff --git a/.vscode/README.md b/.vscode/README.md
new file mode 100644
index 0000000..e12fd87
--- /dev/null
+++ b/.vscode/README.md
@@ -0,0 +1,7 @@
+# VSCodium settings
+
+[Settings](./settings.json) for
+[VSCodium](https://vscodium.com/) /
+[VSCode](https://code.visualstudio.com/) /
+[Code OSS](https://github.com/Microsoft/vscode)
+and [suggested extensions](./extensions.json).
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
index 44d50e2..b1dcc69 100644
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -1,6 +1,7 @@
 {  // Suggested extensions
   "recommendations": [
     // General
+    "aaron-bond.better-comments",
     "medo64.render-crlf",
     "tumido.cron-explained",
 
@@ -16,6 +17,12 @@
     "bbenoist.Nix",
     "jnoortheen.nix-ide",
 
+    // Shell
+    "timonwong.shellcheck",
+
+    // SVG
+    "jock.svg",
+
     // YAML
     "redhat.vscode-yaml",
   ]
diff --git a/.vscode/ltex.dictionary.en-GB.txt b/.vscode/ltex.dictionary.en-GB.txt
index a6ac5c1..77d204d 100644
--- a/.vscode/ltex.dictionary.en-GB.txt
+++ b/.vscode/ltex.dictionary.en-GB.txt
@@ -11,3 +11,5 @@ nixos
 nixpkgs
 ortholinear
 QMK
+VSCode
+VSCodium
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 882347f..984e952 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,9 +1,31 @@
 {
+    // General
+    "better-comments.multilineComments": true,
+    "better-comments.tags": [
+        {
+            "tag": "TODO",
+            "color": "#DF4C9D",
+            "strikethrough": false,
+            "underline": false,
+            "backgroundColor": "transparent",
+            "bold": true,
+            "italic": false,
+        },
+    ],
+    "code-eol.decorateBeforeEol": false,
     "code-eol.highlightExtraWhitespace": true,
     "code-eol.highlightNonDefault": true,
     "cron-explained.codeLens.enabled": true,
+    "cron-explained.codeLens.showCommentAction": false,
+    "cron-explained.codeLens.showTranscript": true,
+    "cron-explained.cronstrueOptions.dayOfWeekStartIndexZero": true,
+    "cron-explained.cronstrueOptions.monthStartIndexZero": false,
+    "cron-explained.cronstrueOptions.use24HourTimeFormat": true,
+    "cron-explained.cronstrueOptions.verbose": false,
+    "cron-explained.hover.enabled": false,
     "diffEditor.ignoreTrimWhitespace": false,
     "editor.insertSpaces": true,
+    "editor.renderWhitespace": "all",
     "files.associations": {
         "*.c": "c",
         "*.cpp": "cpp",
@@ -11,16 +33,39 @@
         "*.hpp": "cpp",
         "*.inc": "c",
     },
+    "files.exclude": {
+        "**/.DS_Store": false,
+        "**/Thumbs.db": false,
+    },
     "files.insertFinalNewline": true,
     "files.trimFinalNewlines": true,
     "files.trimTrailingWhitespace": true,
-    "json.maxItemsComputed": 999999,
+    "search.exclude": {
+        ".build": true,
+        "QMK": true,
+    },
+
+    // Git
+    "git.allowForcePush": false,
+    "git.allowNoVerifyCommit": false,
+    "git.autofetch": true,
+    "git.autofetchPeriod": 120,
+    "git.autoStash": true,
+    "git.enabled": true,
+    "git.enableSmartCommit": false,
+    "git.inputValidationLength": 72,
+    "git.inputValidationSubjectLength": 50,
+    "git.pruneOnFetch": true,
+    "git.pullTags": true,
+    "git.requireGitUserConfig": true,
+    "git.suggestSmartCommit": false,
+
+    // MarkDown
     "ltex.additionalRules.enablePickyRules": true,
     "ltex.additionalRules.motherTongue": "en-GB",
+    "ltex.checkFrequency": "edit",
     "ltex.completionEnabled": true,
-    "ltex.enabled": [
-        "markdown",
-    ],
+    "ltex.enabled": ["markdown"],
     "ltex.language": "en-GB",
     "ltex.statusBarItem": true,
     "markyMarkdown.statsAlignment": "Right",
@@ -30,4 +75,30 @@
     "markyMarkdown.statsShowLines": true,
     "markyMarkdown.statsShowWords": true,
     "markyMarkdown.statsWordsPerMinute": 150,
+
+    // Nix
+    "nix.enableLanguageServer": true,
+    "nixEnvSelector.suggestion": true,
+    "nixEnvSelector.nixFile": "${workspaceFolder}/env.nix",
+
+    // Shell
+    "shellcheck.enable": true,
+    "shellcheck.enableQuickFix": true,
+    "shellcheck.run": "onType",
+    "shellcheck.useWorkspaceRootAsCwd": true,
+
+    // SVG
+    "svg.completion.showAdvanced": true,
+    "svg.pathDataHighlight": true,
+    "svg.preview.background": "dark-transparent",
+    "svg.preview.mode": "img",
+
+    // YAML
+    "yaml.completion": true,
+    "yaml.format.bracketSpacing": true,
+    "yaml.format.printWidth": 120,
+    "yaml.format.proseWrap": "preserve",
+    "yaml.format.singleQuote": false,
+    "yaml.validate": true,
+    "yaml.yamlVersion": "1.2",
 }
diff --git a/README.md b/README.md
index 6bcb377..c997e36 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ First, you'll need to acquire the base components for the build. The board schem
 bought mine from [Keyhive](https://keyhive.xyz/corne) in a nice kit containing most of the basics. To that I had
 to add in the MCUs, a TRRS cable, 42 key switches and keycaps, and a USB-A to USB-C cable.
 
-Once you have everything you just have to put it all together. It is intuitive enough, but there is also a
+Once you have everything, you just have to put it all together. It is intuitive enough, but there is also a
 [handy-dandy build guide](https://github.com/foostan/crkbd/blob/master/corne-cherry/doc/v3/buildguide_en.md) that
 you can follow if needed.
 
diff --git a/env.nix b/env.nix
new file mode 100644
index 0000000..aa926e3
--- /dev/null
+++ b/env.nix
@@ -0,0 +1,11 @@
+{ pkgs ? import <nixpkgs> { }, ... }:
+pkgs.mkShell {
+  nativeBuildInputs = with pkgs; [
+    cacert
+    git
+    nix
+    nix-linter
+    nixpkgs-fmt
+    openssh
+  ];
+}
diff --git a/scripts/README.md b/scripts/README.md
new file mode 100644
index 0000000..dbcdf81
--- /dev/null
+++ b/scripts/README.md
@@ -0,0 +1,3 @@
+# Scripts
+
+A collection of scripts that handle and manipulate the code. Mostly intended for use on the CI.
diff --git a/scripts/nix-cache.nix b/scripts/nix-cache.nix
new file mode 100644
index 0000000..35a7633
--- /dev/null
+++ b/scripts/nix-cache.nix
@@ -0,0 +1,15 @@
+{ pkgs ? import <nixpkgs> { } }:
+with pkgs; writeScript "nix-cache" ''
+  #!${bash}/bin/bash
+  set -eu
+  # shellcheck disable=SC2016
+  ${findutils}/bin/find '${toString ../.}' -type f -name '*.nix' -a \( -not -path '${toString ../QMK}/*' -o -path '${toString ../QMK}/shell.nix' \) |
+    ${findutils}/bin/xargs -I{} sh -c '
+      set -eu
+      if [ "$(${nix}/bin/nix-instantiate --eval -E "builtins.hasAttr \"shellHook\" ((import <nixpkgs> { }).callPackage \"{}\" { })")" == "true" ] ; then
+        ${nix}/bin/nix-build "{}" --no-out-link -A inputDerivation
+      else
+        ${nix}/bin/nix-build "{}" --no-out-link
+      fi
+    ' | ${cachix}/bin/cachix push "''${1}"
+''
diff --git a/scripts/nix-format.nix b/scripts/nix-format.nix
new file mode 100644
index 0000000..88ee70f
--- /dev/null
+++ b/scripts/nix-format.nix
@@ -0,0 +1,7 @@
+{ pkgs ? import <nixpkgs> { } }:
+with pkgs; writeScript "nix-format" ''
+  #!${bash}/bin/bash
+  set -eu
+  ${findutils}/bin/find '${toString ../.}' -type f -name '*.nix' -not -path '${toString ../QMK}/*' |
+    ${findutils}/bin/xargs ${nixpkgs-fmt}/bin/nixpkgs-fmt --check
+''
diff --git a/scripts/nix-lint.nix b/scripts/nix-lint.nix
new file mode 100644
index 0000000..9afe454
--- /dev/null
+++ b/scripts/nix-lint.nix
@@ -0,0 +1,27 @@
+{ pkgs ? import <nixpkgs> { } }:
+with pkgs; writeScript "nix-lint" ''
+  #!${bash}/bin/bash
+  set -eu
+  ${findutils}/bin/find '${toString ../.}' -type f -name '*.nix' -not -path '${toString ../QMK}/*' |
+    ${findutils}/bin/xargs ${nix-linter}/bin/nix-linter \
+      -W no-AlphabeticalArgs \
+      -W no-AlphabeticalBindings \
+      -W BetaReduction \
+      -W DIYInherit \
+      -W EmptyInherit \
+      -W EmptyLet \
+      -W no-EmptyVariadicParamSet \
+      -W FreeLetInFunc \
+      -W LetInInheritRecset \
+      -W no-ListLiteralConcat \
+      -W NegateAtom \
+      -W SequentialLet \
+      -W SetLiteralUpdate \
+      -W UnfortunateArgName \
+      -W no-UnneededAntiquote \
+      -W UnneededRec \
+      -W UnusedArg \
+      -W UnusedLetBind \
+      -W UpdateEmptySet \
+      -q
+''
diff --git a/scripts/nix-logic.nix b/scripts/nix-logic.nix
new file mode 100644
index 0000000..b7a660c
--- /dev/null
+++ b/scripts/nix-logic.nix
@@ -0,0 +1,89 @@
+{ pkgs ? import <nixpkgs> { } }:  # TODO Uncomment some stuff
+with pkgs; writeScript "nix-logic" ''
+  #!${bash}/bin/bash
+  set -eu
+  ${coreutils}/bin/printf '# \033[3mStart\033[0m ########################################################################\n' >&2
+  WORKDIR="$(${coreutils}/bin/mktemp -d)"
+  export WORKDIR
+  OUTPUT="$(${coreutils}/bin/mktemp -d)"
+  export OUTPUT
+  trap 'XC=$?; ${coreutils}/bin/rm -rf -- "''${WORKDIR}" "''${OUTPUT}"; exit ''${XC}' EXIT INT QUIT TERM
+  ${coreutils}/bin/printf '\033[3mWorking directory : %s\033[0m\n' "''${WORKDIR}" >&2
+  ${coreutils}/bin/printf '\033[3mOutputs directory : %s\033[0m\n' "''${OUTPUT}"  >&2
+  ${coreutils}/bin/printf '\n' >&2
+
+  # shellcheck disable=SC2016
+  (
+    cd '${toString ../QMK}' &&
+    ${nix}/bin/nix-shell --pure --run 'qmk list-keyboards' 2>/dev/null | ${coreutils}/bin/shuf | ${findutils}/bin/xargs -P"$(${coreutils}/bin/nproc --all)" -I{} ${bash}/bin/bash -c '
+      set -eu
+
+      OUTPUT="''${OUTPUT}/$(${coreutils}/bin/printf %s "{}" | ${gnused}/bin/sed -r "s|/|_|g")"
+      WORKDIR="''${WORKDIR}/$(${coreutils}/bin/printf %s "{}" | ${gnused}/bin/sed -r "s|/|_|g")"
+
+      ${coreutils}/bin/mkdir -p "''${WORKDIR}"
+      trap '"'"'
+        XC=$?;
+        ${coreutils}/bin/printf "\033[3;%sm%s\033[0m\n" "$([ ''${XC} -eq 0 ] && ${coreutils}/bin/printf 32 || ${coreutils}/bin/printf 31)" "{}";
+        [ ''${XC} -ne 0 ] && ${coreutils}/bin/cat "''${OUTPUT}" >&2;
+        ${coreutils}/bin/rm -rf -- "''${WORKDIR}";
+        exit ''${XC};
+      '"'"' EXIT INT QUIT TERM
+      ${coreutils}/bin/cp '"'"'${toString ../shell.nix}'"'"' "''${WORKDIR}"
+      ${gnused}/bin/sed -i -E '"'"'s|\bKEYBOARD\b\s*=\s*".+?"\s*;|KEYBOARD = "{}";|'"'"' "''${WORKDIR}/shell.nix"
+      cd "''${WORKDIR}"
+
+      # ${coreutils}/bin/printf \
+      #   "# \033[3mWelcome\033[0m ============================================================================================= #\n" \
+      #   >>"''${OUTPUT}"
+      # ${nix}/bin/nix-shell --pure --run welcome >>"''${OUTPUT}" 2>&1
+
+      # ${coreutils}/bin/printf \
+      #   "# \033[3mHelp\033[0m ================================================================================================ #\n" \
+      #   >>"''${OUTPUT}"
+      # MANPAGER=${coreutils}/bin/cat ${nix}/bin/nix-shell --run help >>"''${OUTPUT}" 2>&1
+
+      ${coreutils}/bin/printf \
+        "# \033[3mInit\033[0m ================================================================================================ #\n" \
+        >>"''${OUTPUT}"
+      ${nix}/bin/nix-shell --pure --run init >>"''${OUTPUT}" 2>&1
+      ${coreutils}/bin/test -d "''${WORKDIR}/.git"
+      ${coreutils}/bin/test -d "''${WORKDIR}/QMK"
+      ${coreutils}/bin/test -f "''${WORKDIR}/shell.nix"
+      ${coreutils}/bin/test -d "''${WORKDIR}/keymap"
+      ${coreutils}/bin/test -f "''${WORKDIR}/keymap/keymap.c"
+
+      ${coreutils}/bin/printf \
+        "# \033[3mSetup\033[0m =============================================================================================== #\n" \
+        >>"''${OUTPUT}"
+      ${nix}/bin/nix-shell --pure --run setup >>"''${OUTPUT}" 2>&1  # No root access, but not needed since we will not be flashing
+
+      # ${coreutils}/bin/printf \
+      #   "# \033[3mFormat\033[0m ============================================================================================== #\n" \
+      #   >>"''${OUTPUT}"
+      # ${nix}/bin/nix-shell --pure --run format >>"''${OUTPUT}" 2>&1
+
+      # ${coreutils}/bin/printf \
+      #   "# \033[3mLint\033[0m ================================================================================================ #\n" \
+      #   >>"''${OUTPUT}"
+      # ${nix}/bin/nix-shell --pure --run lint >>"''${OUTPUT}" 2>&1
+
+      ${coreutils}/bin/printf \
+        "# \033[3mCompile\033[0m ============================================================================================= #\n" \
+        >>"''${OUTPUT}"
+      ${nix}/bin/nix-shell --pure --run compile >>"''${OUTPUT}" 2>&1
+
+      # ${coreutils}/bin/printf \
+      #   "# \033[3mFlash\033[0m =============================================================================================== #\n" \
+      #   >>"''${OUTPUT}"
+      # ${nix}/bin/nix-shell --pure --run flash >>"''${OUTPUT}" 2>&1  # Cannot flash since there is no keyboard attached
+
+      # ${coreutils}/bin/printf \
+      #   "# \033[3mClean\033[0m =============================================================================================== #\n" \
+      #   >>"''${OUTPUT}"
+      # ${nix}/bin/nix-shell --pure --run clean >>"''${OUTPUT}" 2>&1
+
+      ${coreutils}/bin/rm -rf -- "''${OUTPUT}"
+    ' ;
+  )
+''
diff --git a/scripts/nix-shellcheck.nix b/scripts/nix-shellcheck.nix
new file mode 100644
index 0000000..24a4747
--- /dev/null
+++ b/scripts/nix-shellcheck.nix
@@ -0,0 +1,33 @@
+{ pkgs ? import <nixpkgs> { } }:
+with pkgs; writeScript "nix-shellcheck" ''
+  #!${bash}/bin/bash
+  set -eu
+  # shellcheck disable=SC2016
+  ${findutils}/bin/find '${toString ../shell.nix}' '${toString ./.}' -type f -name '*.nix' |
+    ${findutils}/bin/xargs -I{} sh -c '
+      set -eu
+      if [ "$(${nix}/bin/nix-instantiate --eval -E "builtins.hasAttr \"shellHook\" ((import <nixpkgs> { }).callPackage \"{}\" { })")" == "true" ] ; then
+        ${nix}/bin/nix-build "{}" --no-out-link -A inputDerivation >/dev/null
+      else
+        ${nix}/bin/nix-build "{}" --no-out-link >/dev/null
+      fi
+      ${nix}/bin/nix-instantiate --eval -E "
+        let
+          pkgs = import <nixpkgs> { };
+          drv = pkgs.callPackage \"{}\" { };
+        in
+        if (builtins.hasAttr \"shellHook\" drv) then
+          (\"#!${bash}/bin/bash\n\" + drv.shellHook)
+        else
+          (builtins.readFile drv)
+      " | \
+        ${coreutils}/bin/tail -c +2 | \
+        ${coreutils}/bin/head -c -2 | \
+        ${findutils}/bin/xargs -0 ${coreutils}/bin/printf | \
+        ${gnused}/bin/sed "s/\\\\\\$/$/g" | (
+          ${shellcheck}/bin/shellcheck -C - &&
+            ${coreutils}/bin/printf "\033[1;32m%s\033[0m\n" "{}" ||
+            (${coreutils}/bin/printf "\033[1;31m%s\033[0m\n" "{}" ; exit 1)
+        )
+    '
+''
diff --git a/scripts/nix-vulnerabilities.nix b/scripts/nix-vulnerabilities.nix
new file mode 100644
index 0000000..a7cdc6a
--- /dev/null
+++ b/scripts/nix-vulnerabilities.nix
@@ -0,0 +1,7 @@
+{ pkgs ? import <nixpkgs> { } }:
+with pkgs; writeScript "nix-vulnerabilities" ''
+  #!${bash}/bin/bash
+  set -eu
+  ${findutils}/bin/find '${toString ../.}' -type f -name '*.nix' -not -path '${toString ../QMK}/*' |
+    ${findutils}/bin/xargs ${vulnix}/bin/vulnix -f
+''
diff --git a/scripts/qmk-format.nix b/scripts/qmk-format.nix
new file mode 100644
index 0000000..18b47a7
--- /dev/null
+++ b/scripts/qmk-format.nix
@@ -0,0 +1,8 @@
+{ pkgs ? import <nixpkgs> { } }:
+with pkgs; writeScript "qmk-format" ''
+  #!${bash}/bin/bash
+  set -eu
+  cd '${toString ../.}'
+  ${nix}/bin/nix-shell --run format
+  ${git}/bin/git diff --exit-code --name-only
+''
diff --git a/scripts/qmk-lint.nix b/scripts/qmk-lint.nix
new file mode 100644
index 0000000..2bb4120
--- /dev/null
+++ b/scripts/qmk-lint.nix
@@ -0,0 +1,7 @@
+{ pkgs ? import <nixpkgs> { } }:
+with pkgs; writeScript "qmk-lint" ''
+  #!${bash}/bin/bash
+  set -eu
+  cd '${toString ../.}'
+  ${nix}/bin/nix-shell --run lint
+''
diff --git a/shell.nix b/shell.nix
index 9a0e162..0bc355a 100644
--- a/shell.nix
+++ b/shell.nix
@@ -23,13 +23,14 @@ let
 
   # Name of the folder inside the QMK submodule
   # e.g., `ergodox_ez`, `0xcb/1337`, et cetera
-  KEYBOARD = "crkbd";
-
-  # Number of threads to be used when compiling.
-  PARALLEL = 16;
+  KEYBOARD = "crkbd/rev1";
 
 in
 pkgs.mkShell {
+  ###############
+  # Environment #
+  ###############
+
   nativeBuildInputs = with pkgs; [
     cacert
     git
@@ -37,421 +38,662 @@ pkgs.mkShell {
     openssh
   ];
 
+  ###########
+  # Scripts #
+  ###########
+
   shellHook = with pkgs; ''
     # Bash configs #################################################################
+
+    # History management
     shopt -s histappend
     shopt -s cmdhist
-    shopt -s checkwinsize
-    shopt -s globstar
-    shopt -s dotglob
 
     HISTCONTROL=ignoreboth
     HISTSIZE=1000
     HISTFILESIZE=2000
 
-    # Extra bling for some commands ################################################
-    eval "$(SHELL='${bash_5}/bin/bash' '${lesspipe}/bin/lesspipe.sh')"
-    eval "$('${coreutils}/bin/dircolors' -b)"
+    # Keep track of window size
+    shopt -s checkwinsize
 
-    # Globals ######################################################################
-    _ROOT_DIR='${toString ./.}'
+    # Globbing
+    shopt -s globstar
+    shopt -s dotglob
 
-    # Create a dynamic CLI prompt ##################################################
-    _compute_prompt() {
-      # First of all, get the exit code of the command before it is lost.
-      local XC=$?
-      local XC_colour="$(
-        if [ "''${XC}" -eq 0 ] ; then
-          '${coreutils}/bin/printf' 10 ;
-        elif [ "''${XC}" -lt 128 ] ; then
-          '${coreutils}/bin/printf' 9  ;
-        else
-          '${coreutils}/bin/printf' 11 ;
-        fi ;
-      )"
-      local XC_PS1="\[\033[38;5;''${XC_colour}m\]$('${coreutils}/bin/printf' '0x%02X' "''${XC}")\[\033[1m\]\[$('${ncurses}/bin/tput' sgr0)\]"
+    # Extra bling for some commands ################################################
 
-      # Compute the path relative to the root of the project (or absolute path if outside of said folder).
-      local path="$(
-        '${coreutils}/bin/realpath' -m --relative-to="''${_ROOT_DIR}" "$('${coreutils}/bin/pwd')"
-      )/"
-      [[ "''${path}" =~ ^\.\..+$    ]] && path="$('${coreutils}/bin/pwd')"
-      [[ "''${path}" =~ ^/.+$|^\./$ ]] || path="./''${path}"
-      local path_PS1="\[\033[1;38;5;12m\]''${path}\[$('${ncurses}/bin/tput' sgr0)\]"
+    # Add colour to less
+    eval "$(SHELL=${bash}/bin/bash ${lesspipe}/bin/lesspipe.sh)"
+
+    # Add colour to ls
+    eval "$(${coreutils}/bin/dircolors -b)"
+
+    # Functions ####################################################################
+
+    #-------------------------------------------------------------------------------
+    # Check if the system has root access.
+    # Currently supported methods are sudo, doas, or su.
+    #
+    # Return:
+    #   0 if the root user is accessible, 1 otherwise.
+    #-------------------------------------------------------------------------------
+    _can_root() {
+      if [ "$(${which}/bin/which doas sudo su 2>/dev/null | ${coreutils}/bin/wc -l)" -gt 0 ] ; then
+        return 0
+      else
+        return 1
+      fi
+    }
 
-      # Check the branch of the repo and its status.
-      local is_git="$(
-        '${git}/bin/git' -C "''${_ROOT_DIR}" rev-parse --git-dir >/dev/null 2>&1 &&
-          [ "$('${git}/bin/git' -C "''${_ROOT_DIR}" rev-parse --show-toplevel)" -ef "''${_ROOT_DIR}" ] &&
-          '${coreutils}/bin/printf' true ;
-      )"
-      local git_status="$(
-        [ ! -z "''${is_git}" ] &&
-          '${git}/bin/git' -C "''${_ROOT_DIR}" status --porcelain ;
-      )"
-      local ref="$(
-        if [ ! -z "''${is_git}" ] ; then
-          '${git}/bin/git' -C "''${_ROOT_DIR}" rev-parse --abbrev-ref HEAD 2>/dev/null || true ;
+    #-------------------------------------------------------------------------------
+    # Clean the QMK submodule.
+    #-------------------------------------------------------------------------------
+    _clean_qmk() {
+      ${git}/bin/git -C '${toString ./QMK}' clean -df
+    }
+
+    #-------------------------------------------------------------------------------
+    # Get the ref of a git repo, or <N/A> if no status is available.
+    #
+    # Args:
+    #   $1 - The repo whose ref is fetched.
+    #
+    # Output:
+    #   The git ref.
+    #-------------------------------------------------------------------------------
+    _git_ref() {
+      local ref
+      ref="$(
+        if _is_git "''${1}" ; then
+          ${git}/bin/git -C "''${1}" rev-parse --abbrev-ref HEAD 2>/dev/null || true ;
         else
-          '${coreutils}/bin/printf' '<N/A>' ;
+          ${coreutils}/bin/printf '<N/A>' ;
         fi ;
       )"
+
       [ "''${ref}" = "HEAD" ] && ref="$(
-        '${git}/bin/git' -C "''${_ROOT_DIR}" rev-parse --short HEAD 2>/dev/null ||
-          '${git}/bin/git' -C "''${_ROOT_DIR}" branch --show-current ;
+        ${git}/bin/git -C "''${1}" rev-parse --short HEAD 2>/dev/null ||
+        ${git}/bin/git -C "''${1}" branch --show-current ;
       )"
-      local ref_colour="$(
-        if [ -z "''${is_git}" ] ; then
-          '${coreutils}/bin/printf' 9  ;
+
+      ${coreutils}/bin/printf '%s\n' "''${ref}"
+    }
+
+    #-------------------------------------------------------------------------------
+    # Get the status of a git repo.
+    #
+    # Args:
+    #   $1 - The repo whose status is checked.
+    #
+    # Output:
+    #   The status of the repo, in a parseable format.
+    #-------------------------------------------------------------------------------
+    _git_status() {
+      _is_git "''${1}" && ${git}/bin/git -C "''${1}" status --porcelain
+    }
+
+    #-------------------------------------------------------------------------------
+    # Check if a directory is a git repo.
+    #
+    # Args:
+    #   $1 - The path to be checked.
+    #
+    # Return:
+    #   0 if it is a git repo, non-zero otherwise.
+    #-------------------------------------------------------------------------------
+    _is_git() {
+      ${git}/bin/git -C "''${1}" rev-parse --git-dir >/dev/null 2>&1 &&
+      [ "$(${git}/bin/git -C "''${1}" rev-parse --show-toplevel)" -ef "''${1}" ]
+    }
+
+    #-------------------------------------------------------------------------------
+    # Get the keymap of an otherwise clean QMK submodule.
+    #
+    # Output:
+    #   The full path to the keymap.
+    #-------------------------------------------------------------------------------
+    _keymap_path() {
+      printf '${toString ./QMK}/'
+      _git_status '${toString ./QMK}' |
+        ${coreutils}/bin/cut -d' ' -f2
+    }
+
+    #-------------------------------------------------------------------------------
+    # Create a symlink of the keymap.
+    #
+    # Args:
+    #   $1 - The name of the keymap to be created.
+    #-------------------------------------------------------------------------------
+    _link_keymap() {
+      _qmk_exec "new-keymap -kb '${KEYBOARD}' -km ''\'''${1}'" >/dev/null 2>&1
+      _keymap_path |
+        ${coreutils}/bin/head -c -2 |
+        ${findutils}/bin/xargs -I{} ${bash}/bin/bash -c "
+          ${coreutils}/bin/rm -rf -- '{}' &&
+          ${coreutils}/bin/ln -sf -- '${toString ./keymap}' '{}' ;
+        " ;
+    }
+
+    #-------------------------------------------------------------------------------
+    # Print a header text of fixed width.
+    #
+    # Args:
+    #   $1 - The text of the header.
+    #
+    # Output:
+    #   An 80 char wide header.
+    #-------------------------------------------------------------------------------
+    _print_header() {
+      ${coreutils}/bin/printf \
+        '# ---------------------------------------------------------------------------- #\r# \033[3m%s\033[0m \n' \
+        "''${1}"
+    }
+
+    #-------------------------------------------------------------------------------
+    # Run a command as root.
+    # Currently supported methods are sudo, doas, or su.
+    #
+    # Args:
+    #   $1 - The command to execute.
+    #-------------------------------------------------------------------------------
+    _root_exec() {
+      if ${which}/bin/which doas >/dev/null 2>&1 ; then
+        doas ${bash}/bin/bash -c "''${1}"
+      elif ${which}/bin/which sudo >/dev/null 2>&1 ; then
+        sudo ${bash}/bin/bash -c "''${1}"
+      elif ${which}/bin/which su >/dev/null 2>&1 ; then
+        su -c "''${1}"
+      fi
+    }
+
+    #-------------------------------------------------------------------------------
+    # Execute a QMK command.
+    #
+    # Args:
+    #   $1 - The QMK command and its arguments.
+    #-------------------------------------------------------------------------------
+    _qmk_exec() {
+      (
+        cd '${toString ./QMK}' &&
+        ${nix}/bin/nix-shell --pure --run "qmk --color ''${1}" ;
+      )
+    }
+
+    #-------------------------------------------------------------------------------
+    # Create a random UUID.
+    #
+    # Output:
+    #   An UUID.
+    #-------------------------------------------------------------------------------
+    _uuid() {
+      ${coreutils}/bin/cat /proc/sys/kernel/random/uuid
+    }
+
+    # Create a dynamic CLI prompt ##################################################
+
+    #-------------------------------------------------------------------------------
+    # Create the git status part of the PS1.
+    #
+    # Output:
+    #   A coloured git ref, or <N/A> if no status is git repo is found.
+    #-------------------------------------------------------------------------------
+    _compute_git_prompt() {
+      # Get the repo status
+      local git_status
+      git_status="$(_git_status '${toString ./.}')"
+
+      # Get the ref, or <N/A>
+      local ref
+      ref="$(_git_ref '${toString ./.}')"
+
+      # Assign a colour to the "cleaniness" of the repo
+      local colour
+      colour="$(
+        if _is_git '${toString ./.}' ; then
+          # No repo -> red
+          ${coreutils}/bin/printf 9 ;
         elif [ \
           "$(
-            '${coreutils}/bin/printf' '%s\n' "''${git_status}" |
-              '${gnused}/bin/sed' '/^\s*$/d' |
-              '${coreutils}/bin/wc' -l ;
+            ${coreutils}/bin/printf '%s\n' "''${git_status}" |
+              ${gnused}/bin/sed '/^\s*$/d' |
+              ${coreutils}/bin/wc -l ;
           )" -eq 0 \
         ] ; then
-          '${coreutils}/bin/printf' 10 ;
+          # Clean repo -> green
+          ${coreutils}/bin/printf 10 ;
         elif
-          '${coreutils}/bin/printf' '%s\n' "''${git_status}" |
-            '${gnugrep}/bin/grep' -q '^.\S' ; then
-          '${coreutils}/bin/printf' 9  ;
+          # Unstaged changes -> red
+          ${coreutils}/bin/printf '%s\n' "''${git_status}" |
+            ${gnugrep}/bin/grep -q '^.\S' ; then
+          ${coreutils}/bin/printf 9 ;
+        else
+          # Staged changes -> yellow
+          ${coreutils}/bin/printf 11 ;
+        fi ;
+      )"
+
+      # Output
+      ${coreutils}/bin/printf "\[\033[1;38;5;%sm\]%s\[$(${ncurses}/bin/tput sgr0)\]" "''${colour}" "''${ref}"
+    }
+
+    #-------------------------------------------------------------------------------
+    # Create the path part of the PS1.
+    #
+    # Output:
+    #   A coloured path string, relative to the root of the project (or absolute
+    #   path if outside of said folder).
+    #-------------------------------------------------------------------------------
+    _compute_path_prompt() {
+      # Get the current relative path
+      local path
+      path="$(
+        ${coreutils}/bin/realpath -m --relative-to='${toString ./.}' "$(${coreutils}/bin/pwd)"
+      )/"
+
+      # If the path is outside of the root dir, use absoule path instead
+      [[ "''${path}" =~ ^\.\..+$    ]] && path="$(${coreutils}/bin/pwd)"
+
+      # Make relative paths more readable
+      [[ "''${path}" =~ ^/.+$|^\./$ ]] || path="./''${path}"
+
+      # Output
+      ${coreutils}/bin/printf "\[\033[1;38;5;12m\]%s\[$(${ncurses}/bin/tput sgr0)\]" "''${path}"
+    }
+
+    #-------------------------------------------------------------------------------
+    # Create the exit code part of the PS1.
+    #
+    # Args:
+    #   $1 - Exit code.
+    #
+    # Output:
+    #   A coloured HEX exit code.
+    #-------------------------------------------------------------------------------
+    _compute_xc_prompt() {
+      # Assign colour depending on exit code value
+      local colour
+      colour="$(
+        if [ "''${1}" -eq 0 ] ; then
+          # Success -> green
+          ${coreutils}/bin/printf 10 ;
+        elif [ "''${1}" -lt 128 ] ; then
+          # Error -> red
+          ${coreutils}/bin/printf 9 ;
         else
-          '${coreutils}/bin/printf' 11 ;
+          # Signal -> yellow
+          ${coreutils}/bin/printf 11 ;
         fi ;
       )"
-      local ref_PS1="\[\033[1;38;5;''${ref_colour}m\]$ref\[$('${ncurses}/bin/tput' sgr0)\]"
 
-      # Nix shell hint.
-      local nix_PS1='\[\033[1;38;5;13m\]NIX+QMK\[$('${ncurses}/bin/tput' sgr0)\]'
+      # Output
+      ${coreutils}/bin/printf "\[\033[38;5;%sm\]0x%02X\[\033[1m\]\[$(${ncurses}/bin/tput sgr0)\]" "''${colour}" "''${1}"
+    }
+
+    #-------------------------------------------------------------------------------
+    # Create a dynamic PS1.
+    #-------------------------------------------------------------------------------
+    _compute_prompt() {
+      # First of all, get the exit code of the command before it is lost.
+      local XC=$?
+
+      # Compute the different parts of the PS1
+      local nix_PS1
+      # shellcheck disable=SC2016
+      nix_PS1='\[\033[1;38;5;13m\]NIX+QMK\[$(${ncurses}/bin/tput sgr0)\]'
+      local git_PS1
+      git_PS1="$(_compute_git_prompt)"
+      local path_PS1
+      path_PS1="$(_compute_path_prompt)"
+      local XC_PS1
+      XC_PS1="$(_compute_xc_prompt "''${XC}")"
 
-      # Colour CLI prompt.
-      PS1="\[$('${ncurses}/bin/tput' sgr0)\][ ''${nix_PS1} @ ''${ref_PS1} : ''${path_PS1} ] ''${XC_PS1} > \[$('${ncurses}/bin/tput' sgr0)\]"
+      # CLI prompt.
+      PS1="\[$(${ncurses}/bin/tput sgr0)\][ ''${nix_PS1} @ ''${git_PS1} : ''${path_PS1} ] ''${XC_PS1} > \[$(${ncurses}/bin/tput sgr0)\]"
 
       return "''${XC}"  # Restore the original exit code
     }
+
     PROMPT_COMMAND=_compute_prompt
 
     # Aliases ######################################################################
-    alias ls="'${coreutils}/bin/ls' --color=auto"
-    alias ll="'${coreutils}/bin/ls' --color=auto -lAh"
+
+    # ls
+    alias ls="${coreutils}/bin/ls --color=auto"
+    alias ll="${coreutils}/bin/ls --color=auto -lAh"
 
     # Commands #####################################################################
+
+    #-------------------------------------------------------------------------------
+    # Initialise the current working directory.
+    #-------------------------------------------------------------------------------
     init() {
       local XC=0
 
-      (
-        '${git}/bin/git' -C "''${_ROOT_DIR}" rev-parse --git-dir >/dev/null 2>&1 && \
-        [ "$('${git}/bin/git' -C "''${_ROOT_DIR}" rev-parse --show-toplevel)" -ef "''${_ROOT_DIR}" ] ;
-      ) || (
-        '${coreutils}/bin/printf' \
-          '# \033[3mInitialise repo\033[0m ------------------------------------------------------------------------------------- #\n' ;
+      local KEYMAP_ID
+      KEYMAP_ID="$(_uuid)"
+
+      if ! _is_git '${toString ./.}' ; then
+        _print_header 'Initialise repo'
         (
-          '${git}/bin/git' -C "''${_ROOT_DIR}" init -b main
-        ) || XC="$(( "''${XC}" + 0x01 ))" ;
-        '${coreutils}/bin/printf' '\n' ;
-      )
+          ${git}/bin/git -C '${toString ./.}' init -b main ;
+        ) || XC="$(( "''${XC}" + 0x01 ))"
+        ${coreutils}/bin/printf '\n'
+      fi
 
-      [ -d "''${_ROOT_DIR}/QMK/" ] && (
-        '${coreutils}/bin/printf' \
-          '# \033[3mClean up submodule\033[0m ---------------------------------------------------------------------------------- #\n' ;
+      if [ -d '${toString ./QMK}' ] ; then
+        _print_header 'Clean up submodule'
         (
-          '${coreutils}/bin/rm' -rf -- "''${_ROOT_DIR}/QMK/" &&
-            '${coreutils}/bin/printf' "Submodule path 'QMK': deleted\n" ;
-        ) || XC="$(( "''${XC}" + 0x02 ))" ;
-        '${coreutils}/bin/printf' '\n' ;
-      )
+          _clean_qmk ;
+        ) || XC="$(( "''${XC}" + 0x02 ))"
+        ${coreutils}/bin/printf '\n'
+      fi
 
-      (
-        '${git}/bin/git' -C "''${_ROOT_DIR}" config --file .gitmodules --get-regexp path |
-          '${gawk}/bin/awk' '{ print $2 }' |
-          '${gnugrep}/bin/grep' -q '^QMK$' ;
-      ) || (
-        '${coreutils}/bin/printf' \
-          '# \033[3mAdd QMK submodule\033[0m ----------------------------------------------------------------------------------- #\n' ;
+      if ! (
+        ${git}/bin/git -C '${toString ./.}' config --file .gitmodules --get-regexp path |
+          ${gawk}/bin/awk '{ print $2 }' |
+          ${gnugrep}/bin/grep -q '^QMK$' ;
+      ) ; then
+        _print_header 'Add submodule'
         (
-          '${git}/bin/git' -C "''${_ROOT_DIR}" submodule add --branch master -- 'https://github.com/qmk/qmk_firmware/' QMK ;
-        ) || XC="$(( "''${XC}" + 0x04 ))" ;
-        '${coreutils}/bin/printf' '\n' ;
-      )
+          ${git}/bin/git -C '${toString ./.}' submodule add --branch master -- \
+            'https://github.com/qmk/qmk_firmware/' QMK ;
+        ) || XC="$(( "''${XC}" + 0x04 ))"
+        ${coreutils}/bin/printf '\n'
+      fi
 
       if [ "''${XC}" -eq 0 ] ; then
-        '${coreutils}/bin/printf' \
-          '# \033[3mInit submodule\033[0m -------------------------------------------------------------------------------------- #\n' ;
+        _print_header 'Init submodule'
         (
-          '${git}/bin/git' -C "''${_ROOT_DIR}" submodule update --init --recursive --progress ;
-        ) || XC="$(( "''${XC}" + 0x08 ))" ;
-        '${coreutils}/bin/printf' '\n' ;
+          ${git}/bin/git -C '${toString ./.}' submodule update --init --recursive --progress ;
+        ) || XC="$(( "''${XC}" + 0x08 ))"
+        ${coreutils}/bin/printf '\n'
       fi
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mClean up workspace\033[0m ---------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Clean up workspace'
       (
-        '${coreutils}/bin/rm' -rf -- "''${_ROOT_DIR}/keymap/" ;
-      ) || XC="$(( "''${XC}" + 0x10 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        ${coreutils}/bin/rm -rf -- '${toString ./keymap}' ;
+      ) || XC="$(( "''${XC}" + 0x10 ))"
+      ${coreutils}/bin/printf '\n'
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mCopy default keymap\033[0m --------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Init workspace'
       (
-        '${coreutils}/bin/cp' -rf -- "''${_ROOT_DIR}/QMK/keyboards/${KEYBOARD}/keymaps/default" "''${_ROOT_DIR}/keymap" ;
-      ) || XC="$(( "''${XC}" + 0x20 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        _qmk_exec "new-keymap -kb '${KEYBOARD}' -km ''\'''${KEYMAP_ID}'" &&
+        _keymap_path |
+          ${findutils}/bin/xargs -I{} ${bash}/bin/bash -c "
+            ${coreutils}/bin/rm -rf -- '${toString ./keymap}' &&
+            ${coreutils}/bin/cp -rf -- '{}' '${toString ./keymap}' ;
+          " ;
+      ) || XC="$(( "''${XC}" + 0x20 ))"
+      ${coreutils}/bin/printf '\n'
+
+      _print_header 'Clean up submodule'
+      (
+        _clean_qmk ;
+      ) || XC="$(( "''${XC}" + 0x40 ))"
+      ${coreutils}/bin/printf '\n'
 
       return "''${XC}"
     }
 
+    #-------------------------------------------------------------------------------
+    # Set up the current machine to ensure other commands work as expected.
+    # May require a reboot.
+    #-------------------------------------------------------------------------------
     setup() {
       local XC=0
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mSet up udev rules\033[0m ----------------------------------------------------------------------------------- #\n' ;
+      if ! _can_root ; then
+        ${coreutils}/bin/printf '\033[33mWARNING: No root access, skipping setup.\033[0m\n'
+        return 0
+      fi
+
+      _print_header 'Set up udev rules'
       (
-        '${coreutils}/bin/printf' 'Set up /etc/udev/rules.d/\n' &&
-          $(
-            (${which}/bin/which doas >/dev/null 2>/dev/null && ${coreutils}/bin/printf 'doas bash') ||
-              (${which}/bin/which sudo >/dev/null 2>/dev/null && ${coreutils}/bin/printf 'sudo bash') ||
-              (${coreutils}/bin/printf 'su')
-          ) -c "
-            '${coreutils}/bin/mkdir' -p '/etc/udev/rules.d/' &&
-            '${coreutils}/bin/cp' -rf \"''${_ROOT_DIR}/QMK/util/udev/\"* '/etc/udev/rules.d/'
-          " &&
-          '${coreutils}/bin/printf' '/etc/udev/rules.d/ set up successfully\n' ;
-      ) || XC="$(( "''${XC}" + 0x01 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
-
-      '${coreutils}/bin/printf' \
-        '# \033[3mResize /run/user/$UID\033[0m ------------------------------------------------------------------------------- #\n' ;
+        _root_exec "
+          ${coreutils}/bin/mkdir -p '/etc/udev/rules.d/' &&
+          ${coreutils}/bin/cp -rf '${toString ./QMK/util/udev}/'* '/etc/udev/rules.d/' ;
+        " && ${coreutils}/bin/printf '/etc/udev/rules.d/ set up successfully\n' ;
+      ) || XC="$(( "''${XC}" + 0x01 ))"
+      ${coreutils}/bin/printf '\n'
+
+      # shellcheck disable=SC2016
+      _print_header 'Resize /run/user/$UID'
+      # shellcheck disable=SC2016
       (
-        '${coreutils}/bin/printf' 'Set up /etc/udev/rules.d/\n' &&
-          $(
-            (${which}/bin/which doas >/dev/null 2>/dev/null && ${coreutils}/bin/printf 'doas sh') ||
-              (${which}/bin/which sudo >/dev/null 2>/dev/null && ${coreutils}/bin/printf 'sudo sh') ||
-              (${coreutils}/bin/printf 'su')
-          ) -c "
-            '${coreutils}/bin/mkdir' -p '/etc/systemd/logind.conf.d/' &&
-            '${coreutils}/bin/printf' '[Login]\nRuntimeDirectorySize=99%%\n' >'/etc/systemd/logind.conf.d/runtime_directory_size.conf'
-          " &&
-          '${coreutils}/bin/printf' '/run/user/$UID resized successfully\n' ;
-      ) || XC="$(( "''${XC}" + 0x02 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        _root_exec "
+          ${coreutils}/bin/mkdir -p '/etc/systemd/logind.conf.d/' &&
+          ${coreutils}/bin/printf '[Login]\nRuntimeDirectorySize=99%%\n' >'/etc/systemd/logind.conf.d/runtime_directory_size.conf'
+        " && ${coreutils}/bin/printf '/run/user/$UID resized successfully\n' ;
+      ) || XC="$(( "''${XC}" + 0x02 ))"
+      ${coreutils}/bin/printf '\n'
 
       if [ "''${XC}" -eq 0 ] ; then
-        '${coreutils}/bin/printf' \
-          '# \033[3mFinish\033[0m ---------------------------------------------------------------------------------------------- #\n' ;
-        '${coreutils}/bin/printf' '\033[3mSet up complete.\nPlease reboot your system to ensure that changes take effect.\033[0m\n\n'
+        _print_header 'Finish'
+        ${coreutils}/bin/printf '\033[3mSet up complete.\nPlease reboot your system to ensure that changes take effect.\033[0m\n\n'
       fi
 
       return "''${XC}"
     }
 
+    #-------------------------------------------------------------------------------
+    # Update the QMK submodule.
+    #-------------------------------------------------------------------------------
     update() {
       local XC=0
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mUpdate submodules\033[0m ----------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Update submodule'
       (
-        '${git}/bin/git' -C "''${_ROOT_DIR}" submodule update --remote --progress ;
-      ) || XC="$(( "''${XC}" + 0x01 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        ${git}/bin/git -C '${toString ./.}' submodule update --remote --progress -- '${toString ./QMK}' ;
+      ) || XC="$(( "''${XC}" + 0x01 ))"
+      ${coreutils}/bin/printf '\n'
 
       return "''${XC}"
     }
 
+    #-------------------------------------------------------------------------------
+    # Clean up the working directory.
+    #-------------------------------------------------------------------------------
     clean() {
       local XC=0
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mClean workspace\033[0m ------------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Clean up submodule'
       (
-        '${git}/bin/git' -C "''${_ROOT_DIR}/QMK" clean -df &&
-          '${git}/bin/git' -C "''${_ROOT_DIR}" clean -dfX ;
-      ) || XC="$(( "''${XC}" + 0x01 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        _clean_qmk ;
+      ) || XC="$(( "''${XC}" + 0x01 ))"
+      ${coreutils}/bin/printf '\n'
+
+      _print_header 'Clean up repo'
+      (
+        ${git}/bin/git -C '${toString ./.}' clean -dfX ;
+      ) || XC="$(( "''${XC}" + 0x02 ))"
+      ${coreutils}/bin/printf '\n'
 
       return "''${XC}"
     }
 
+    #-------------------------------------------------------------------------------
+    # Lint the source code.
+    #-------------------------------------------------------------------------------
     lint() {
       local XC=0
 
-      local KEYMAP_ID="$('${coreutils}/bin/cat' /proc/sys/kernel/random/uuid)"
+      local KEYMAP_ID
+      KEYMAP_ID="$(_uuid)"
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mLink keymap\033[0m ----------------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Clean up submodule'
       (
-        '${coreutils}/bin/rm' -f -- "''${_ROOT_DIR}"/'QMK/keyboards/${KEYBOARD}/keymaps'/"''${KEYMAP_ID}" &&
-          '${coreutils}/bin/ln' -sf "''${_ROOT_DIR}/keymap" "''${_ROOT_DIR}"/'QMK/keyboards/${KEYBOARD}/keymaps'/"''${KEYMAP_ID}" &&
-          '${coreutils}/bin/printf' 'Linked QMK/keyboards/${KEYBOARD}/keymaps/%s\n' "''${KEYMAP_ID}" ;
-      ) || XC="$(( "''${XC}" + 0x01 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        _clean_qmk ;
+      ) || XC="$(( "''${XC}" + 0x01 ))"
+      ${coreutils}/bin/printf '\n'
+
+      _print_header 'Link keymap'
+      (
+        _link_keymap "''${KEYMAP_ID}" ;
+      ) || XC="$(( "''${XC}" + 0x02 ))"
+      ${coreutils}/bin/printf '\n'
 
       if [ "''${XC}" -eq 0 ] ; then
-        '${coreutils}/bin/printf' \
-          '# \033[3mQMK linting\033[0m ----------------------------------------------------------------------------------------- #\n' ;
+        _print_header 'Lint code'
         (
-          cd "''${_ROOT_DIR}/QMK" &&
-            '${nix}/bin/nix-shell' --pure --run "qmk lint --strict -kb '${KEYBOARD}' -km ''\'''${KEYMAP_ID}'" ;
-        ) || XC="$(( "''${XC}" + 0x02 ))" ;
-        '${coreutils}/bin/printf' '\n' ;
+          _qmk_exec "lint --strict -kb '${KEYBOARD}' -km ''\'''${KEYMAP_ID}'" ;
+        ) || XC="$(( "''${XC}" + 0x04 ))"
+        ${coreutils}/bin/printf '\n'
       fi
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mUnlink keymap\033[0m --------------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Unlink keymap'
       (
-        '${git}/bin/git' -C "''${_ROOT_DIR}/QMK" clean -df ;
-      ) || XC="$(( "''${XC}" + 0x04 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        _clean_qmk ;
+      ) || XC="$(( "''${XC}" + 0x08 ))"
+      ${coreutils}/bin/printf '\n'
 
       return "''${XC}"
     }
 
+    #-------------------------------------------------------------------------------
+    # Format the source code.
+    #-------------------------------------------------------------------------------
     format() {
       local XC=0
 
-      local KEYMAP_ID="$('${coreutils}/bin/cat' /proc/sys/kernel/random/uuid)"
+      local KEYMAP_ID
+      KEYMAP_ID="$(_uuid)"
+
+      _print_header 'Clean up submodule'
+      (
+        _clean_qmk ;
+      ) || XC="$(( "''${XC}" + 0x01 ))"
+      ${coreutils}/bin/printf '\n'
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mLink keymap\033[0m ----------------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Link keymap'
       (
-        '${coreutils}/bin/rm' -f -- "''${_ROOT_DIR}"/'QMK/keyboards/${KEYBOARD}/keymaps'/"''${KEYMAP_ID}" &&
-          '${coreutils}/bin/ln' -sf "''${_ROOT_DIR}/keymap" "''${_ROOT_DIR}"/'QMK/keyboards/${KEYBOARD}/keymaps'/"''${KEYMAP_ID}" &&
-          '${coreutils}/bin/printf' 'Linked QMK/keyboards/${KEYBOARD}/keymaps/%s\n' "''${KEYMAP_ID}" ;
-      ) || XC="$(( "''${XC}" + 0x01 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        _link_keymap "''${KEYMAP_ID}" ;
+      ) || XC="$(( "''${XC}" + 0x02 ))"
+      ${coreutils}/bin/printf '\n'
 
       if [ "''${XC}" -eq 0 ] ; then
-        '${coreutils}/bin/printf' \
-          '# \033[3mFormat code\033[0m ----------------------------------------------------------------------------------------- #\n' ;
+        _print_header 'Format code'
         (
-          cd "''${_ROOT_DIR}/QMK" &&
-            '${nix}/bin/nix-shell' --pure --run "${clang-tools}/bin/clang-format -i --verbose \$(
-              ${findutils}/bin/find -L 'keyboards/${KEYBOARD}/keymaps'/"''${KEYMAP_ID}" -type f -regextype awk -regex '.+\.(h|hpp|c|cpp|inc)'
-            )" ;
-        ) || XC="$(( "''${XC}" + 0x02 ))" ;
-        '${coreutils}/bin/printf' '\n' ;
+          cd '${toString ./QMK}' &&
+          ${nix}/bin/nix-shell --pure --run "
+            ${findutils}/bin/find -L '$(_keymap_path)' -type f -regextype awk -regex '.+\.(h|hpp|c|cpp|inc)' |
+              ${findutils}/bin/xargs ${clang-tools}/bin/clang-format -i --verbose
+          " ;
+        ) || XC="$(( "''${XC}" + 0x04 ))"
+        ${coreutils}/bin/printf '\n'
       fi
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mUnlink keymap\033[0m --------------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Unlink keymap'
       (
-        '${git}/bin/git' -C "''${_ROOT_DIR}/QMK" clean -df ;
-      ) || XC="$(( "''${XC}" + 0x04 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        _clean_qmk ;
+      ) || XC="$(( "''${XC}" + 0x08 ))"
+      ${coreutils}/bin/printf '\n'
 
       return "''${XC}"
     }
 
+    #-------------------------------------------------------------------------------
+    # Compile the source code.
+    #-------------------------------------------------------------------------------
     compile() {
       local XC=0
 
-      local KEYMAP_ID="$('${coreutils}/bin/cat' /proc/sys/kernel/random/uuid)"
+      local KEYMAP_ID
+      KEYMAP_ID="$(_uuid)"
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mClean up old builds\033[0m --------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Clean up submodule'
       (
-        cd "''${_ROOT_DIR}/QMK" &&
-          '${nix}/bin/nix-shell' --pure --run 'qmk clean' &&
-          '${coreutils}/bin/printf' 'Cleaned QMK/.build\n' ;
-      ) || XC="$(( "''${XC}" + 0x01 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
-
-      '${coreutils}/bin/printf' \
-        '# \033[3mLink keymap\033[0m ----------------------------------------------------------------------------------------- #\n' ;
+        _clean_qmk &&
+        _qmk_exec "clean" ;
+      ) || XC="$(( "''${XC}" + 0x01 ))"
+      ${coreutils}/bin/printf '\n'
+
+      _print_header 'Link keymap'
       (
-        '${coreutils}/bin/rm' -f -- "''${_ROOT_DIR}"/'QMK/keyboards/${KEYBOARD}/keymaps'/"''${KEYMAP_ID}" &&
-          '${coreutils}/bin/ln' -sf "''${_ROOT_DIR}/keymap" "''${_ROOT_DIR}"/'QMK/keyboards/${KEYBOARD}/keymaps'/"''${KEYMAP_ID}" &&
-          '${coreutils}/bin/printf' 'Linked QMK/keyboards/${KEYBOARD}/keymaps/%s\n' "''${KEYMAP_ID}" ;
-      ) || XC="$(( "''${XC}" + 0x02 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        _link_keymap "''${KEYMAP_ID}" ;
+      ) || XC="$(( "''${XC}" + 0x02 ))"
+      ${coreutils}/bin/printf '\n'
 
       if [ "''${XC}" -eq 0 ] ; then
-        '${coreutils}/bin/printf' \
-          '# \033[3mCompile\033[0m --------------------------------------------------------------------------------------------- #\n' ;
+        _print_header 'Compile code'
         (
-          cd "''${_ROOT_DIR}/QMK" &&
-            '${nix}/bin/nix-shell' --pure --run "qmk compile -j '${builtins.toString PARALLEL}' -kb '${KEYBOARD}' -km ''\'''${KEYMAP_ID}'" ;
-        ) || XC="$(( "''${XC}" + 0x04 ))" ;
-        '${coreutils}/bin/printf' '\n' ;
+          _qmk_exec "compile -j $(${coreutils}/bin/nproc --all) -kb '${KEYBOARD}' -km ''\'''${KEYMAP_ID}'" ;
+        ) || XC="$(( "''${XC}" + 0x04 ))"
+        ${coreutils}/bin/printf '\n'
       fi
 
       if [ "''${XC}" -eq 0 ] ; then
-        '${coreutils}/bin/printf' \
-          '# \033[3mExtract HEX file\033[0m ------------------------------------------------------------------------------------ #\n' ;
+        _print_header 'Extract HEX file'
         (
-          '${coreutils}/bin/mkdir' -p "''${_ROOT_DIR}/.build" &&
-            '${findutils}/bin/find' "''${_ROOT_DIR}/QMK/.build" -type f -regextype awk -iregex '^.*\.(hex|bin)$' |
-              '${coreutils}/bin/head' -1 |
-              '${findutils}/bin/xargs' -i cp -f -- '{}' "''${_ROOT_DIR}/.build/firmware.hex" &&
-            '${coreutils}/bin/printf' 'Extracted .build/firmware.hex\n' ;
-        ) || XC="$(( "''${XC}" + 0x08 ))" ;
-        '${coreutils}/bin/printf' '\n'
+          ${coreutils}/bin/mkdir -p '${toString ./.build}' &&
+          ${findutils}/bin/find '${toString ./QMK/.build}' -type f -regextype awk -iregex '^.*\.(hex|bin)$' |
+            ${coreutils}/bin/head -1 |
+            ${findutils}/bin/xargs -I{} cp -f -- '{}' '${toString ./.build/firmware.hex}' &&
+          ${coreutils}/bin/printf 'Extracted .build/firmware.hex\n' ;
+        ) || XC="$(( "''${XC}" + 0x08 ))"
+        ${coreutils}/bin/printf '\n'
       fi
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mUnlink keymap\033[0m --------------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Unlink keymap'
       (
-        '${git}/bin/git' -C "''${_ROOT_DIR}/QMK" clean -df ;
-      ) || XC="$(( "''${XC}" + 0x10 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        _clean_qmk ;
+      ) || XC="$(( "''${XC}" + 0x10 ))"
+      ${coreutils}/bin/printf '\n'
 
       return "''${XC}"
     }
 
+    #-------------------------------------------------------------------------------
+    # Flash a keyboard.
+    #-------------------------------------------------------------------------------
     flash() {
       local XC=0
 
-      local KEYMAP_ID="$('${coreutils}/bin/cat' /proc/sys/kernel/random/uuid)"
+      local KEYMAP_ID
+      KEYMAP_ID="$(_uuid)"
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mClean up old builds\033[0m --------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Clean up submodule'
       (
-        cd "''${_ROOT_DIR}/QMK" &&
-          '${nix}/bin/nix-shell' --pure --run 'qmk clean' &&
-          '${coreutils}/bin/printf' 'Cleaned QMK/.build\n' ;
-      ) || XC="$(( "''${XC}" + 0x01 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
-
-      '${coreutils}/bin/printf' \
-        '# \033[3mLink keymap\033[0m ----------------------------------------------------------------------------------------- #\n' ;
+        _clean_qmk &&
+        _qmk_exec "clean" ;
+      ) || XC="$(( "''${XC}" + 0x01 ))"
+      ${coreutils}/bin/printf '\n'
+
+      _print_header 'Link keymap'
       (
-        '${coreutils}/bin/rm' -f -- "''${_ROOT_DIR}"/'QMK/keyboards/${KEYBOARD}/keymaps'/"''${KEYMAP_ID}" &&
-          '${coreutils}/bin/ln' -sf "''${_ROOT_DIR}/keymap" "''${_ROOT_DIR}"/'QMK/keyboards/${KEYBOARD}/keymaps'/"''${KEYMAP_ID}" &&
-          '${coreutils}/bin/printf' 'Linked QMK/keyboards/${KEYBOARD}/keymaps/%s\n' "''${KEYMAP_ID}" ;
-      ) || XC="$(( "''${XC}" + 0x02 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        _link_keymap "''${KEYMAP_ID}" ;
+      ) || XC="$(( "''${XC}" + 0x02 ))"
+      ${coreutils}/bin/printf '\n'
 
       if [ "''${XC}" -eq 0 ] ; then
-        '${coreutils}/bin/printf' \
-          '# \033[3mCompile\033[0m --------------------------------------------------------------------------------------------- #\n' ;
+        _print_header 'Compile code'
         (
-          cd "''${_ROOT_DIR}/QMK" &&
-            '${nix}/bin/nix-shell' --pure --run "qmk compile -j '${builtins.toString PARALLEL}' -kb '${KEYBOARD}' -km ''\'''${KEYMAP_ID}'" ;
-        ) || XC="$(( "''${XC}" + 0x04 ))" ;
-        '${coreutils}/bin/printf' '\n' ;
+          _qmk_exec "compile -j $(${coreutils}/bin/nproc --all) -kb '${KEYBOARD}' -km ''\'''${KEYMAP_ID}'" ;
+        ) || XC="$(( "''${XC}" + 0x04 ))"
+        ${coreutils}/bin/printf '\n'
       fi
 
       if [ "''${XC}" -eq 0 ] ; then
-        '${coreutils}/bin/printf' \
-          '# \033[3mFlash\033[0m ----------------------------------------------------------------------------------------------- #\n' ;
+        _print_header 'Flash keyboard'
         (
-          cd "''${_ROOT_DIR}/QMK" &&
-            '${nix}/bin/nix-shell' --pure --run "qmk flash -j '${builtins.toString PARALLEL}' -kb '${KEYBOARD}' -km ''\'''${KEYMAP_ID}'" ;
-        ) || XC="$(( "''${XC}" + 0x08 ))" ;
-        '${coreutils}/bin/printf' '\n' ;
+          _qmk_exec "flash -kb '${KEYBOARD}' -km ''\'''${KEYMAP_ID}'" ;
+        ) || XC="$(( "''${XC}" + 0x08 ))"
+        ${coreutils}/bin/printf '\n'
       fi
 
-      '${coreutils}/bin/printf' \
-        '# \033[3mUnlink keymap\033[0m --------------------------------------------------------------------------------------- #\n' ;
+      _print_header 'Unlink keymap'
       (
-        '${git}/bin/git' -C "''${_ROOT_DIR}/QMK" clean -df ;
-      ) || XC="$(( "''${XC}" + 0x10 ))" ;
-      '${coreutils}/bin/printf' '\n' ;
+        _clean_qmk ;
+      ) || XC="$(( "''${XC}" + 0x10 ))"
+      ${coreutils}/bin/printf '\n'
 
       return "''${XC}"
     }
 
+    #-------------------------------------------------------------------------------
+    # Show a man-like help page.
+    #-------------------------------------------------------------------------------
     help() {
-      '${coreutils}/bin/cat' <<EOF | MANPAGER="''${MANPAGER:-''${PAGER:-${most}/bin/most -s}}" '${man}/bin/man' -l - 2>/dev/null
+      ${coreutils}/bin/cat <<EOF | MANPAGER="''${MANPAGER:-''${PAGER:-${most}/bin/most -s}}" ${man}/bin/man -l - 2>/dev/null
     .TH "NIX+QMK" "1" "" "" "Nix+QMK toolbox"
     .\----------------------------------------------------------------------------\.
     .SH NAME
@@ -581,19 +823,23 @@ pkgs.mkShell {
       return 0
     }
 
+    #-------------------------------------------------------------------------------
+    # Show welcome screen.
+    #-------------------------------------------------------------------------------
     welcome() {
-      '${coreutils}/bin/printf' '\033[0m     , , , , , ,\n'
-      '${coreutils}/bin/printf' '\033[0m   \033[1;30m.-------------.\033[0m\n'
-      '${coreutils}/bin/printf' '\033[0m - \033[1;30m|             | \033[0m-   \033[3mWelcome to this (unofficial) \033[1mNix+QMK toolbox\033[0;3m.\033[0m\n'
-      '${coreutils}/bin/printf' '\033[0m - \033[1;30m|   \033[0;1m|  |  |\033[0;1;30m   | \033[0m-\n'
-      '${coreutils}/bin/printf' '\033[0m - \033[1;30m|   \033[0;1m|  |  |\033[0;1;30m   | \033[0m-   \033[3mAn opinionated set of scripts for standalone QMK keymaps\033[0m\n'
-      '${coreutils}/bin/printf' '\033[0m - \033[1;30m|   \033[0;1m|__|__|\033[0;1;30m   | \033[0m-\n'
-      '${coreutils}/bin/printf' '\033[0m - \033[1;30m|      \033[0;1m|\033[0;1;30m      | \033[0m-\n'
-      '${coreutils}/bin/printf' '\033[0m - \033[1;30m|_____________| \033[0m-\n'
-      '${coreutils}/bin/printf' '\033[0m     , , , , , ,\n'
-      '${coreutils}/bin/printf' '\n'
-      '${coreutils}/bin/printf' '\033[0m\033[3mType `help` to get info on available commands.\033[0m\n'
-      '${coreutils}/bin/printf' '\n'
+      ${coreutils}/bin/printf '\033[0m     , , , , , ,\n'
+      ${coreutils}/bin/printf '\033[0m   \033[1;30m.-------------.\033[0m\n'
+      ${coreutils}/bin/printf '\033[0m - \033[1;30m|             | \033[0m-   \033[3mWelcome to this (unofficial) \033[1mNix+QMK toolbox\033[0;3m.\033[0m\n'
+      ${coreutils}/bin/printf '\033[0m - \033[1;30m|   \033[0;1m|  |  |\033[0;1;30m   | \033[0m-\n'
+      ${coreutils}/bin/printf '\033[0m - \033[1;30m|   \033[0;1m|  |  |\033[0;1;30m   | \033[0m-   \033[3mAn opinionated set of scripts for standalone QMK keymaps\033[0m\n'
+      ${coreutils}/bin/printf '\033[0m - \033[1;30m|   \033[0;1m|__|__|\033[0;1;30m   | \033[0m-\n'
+      ${coreutils}/bin/printf '\033[0m - \033[1;30m|      \033[0;1m|\033[0;1;30m      | \033[0m-\n'
+      ${coreutils}/bin/printf '\033[0m - \033[1;30m|_____________| \033[0m-\n'
+      ${coreutils}/bin/printf '\033[0m     , , , , , ,\n'
+      ${coreutils}/bin/printf '\n'
+      # shellcheck disable=SC2016
+      ${coreutils}/bin/printf '\033[0m\033[3mType `help` to get info on available commands.\033[0m\n'
+      ${coreutils}/bin/printf '\n'
 
       return 0
     }