diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 9ad06e4..75856e2 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -10,7 +10,7 @@ repos:
             - id: reuse
     -
         repo: https://gitlab.com/vojko.pribudic.foss/pre-commit-update
-        rev: v0.3.3post1
+        rev: v0.4.0post1
         hooks:
             -
                 id: pre-commit-update
@@ -75,7 +75,7 @@ repos:
                 exclude: *default_excludes
     -
         repo: https://github.com/Jayman2000/jasons-pre-commit-hooks
-        rev: v0.1.0
+        rev: v0.2.0
         hooks:
             -
                 id: detect-bad-unicode
@@ -145,7 +145,7 @@ repos:
                     - --strict
     -
         repo: https://github.com/astral-sh/ruff-pre-commit
-        rev: v0.5.7
+        rev: v0.6.2
         hooks:
             -
                 id: ruff
diff --git a/jasons_pre_commit_hooks/editor_config.ini b/jasons_pre_commit_hooks/editor_config.ini
index 9c65baa..6b85e9a 100644
--- a/jasons_pre_commit_hooks/editor_config.ini
+++ b/jasons_pre_commit_hooks/editor_config.ini
@@ -222,3 +222,12 @@ insert_final_newline = true
 # [4]: <https://git-scm.com/docs/git-diff#_combined_diff_format>
 # editorconfig-checker-enable
 max_line_length = 72
+
+[**.nix]
+# I’m only using 2 for Nix files because the Nix ecosystem project
+# itself uses 2 spaces for indentation [1].
+#
+# editorconfig-checker-disable
+# [1]: <https://github.com/NixOS/rfcs/blob/62d1245ec1eae275edb996229585637035c02538/rfcs/0166-nix-formatting.md#indentation>
+# editorconfig-checker-enable
+indent_size = 2
diff --git a/jasons_pre_commit_hooks/repo_style_checker.py b/jasons_pre_commit_hooks/repo_style_checker.py
index 2f743df..98ecf2b 100644
--- a/jasons_pre_commit_hooks/repo_style_checker.py
+++ b/jasons_pre_commit_hooks/repo_style_checker.py
@@ -197,6 +197,14 @@ class PreCommitRepoInfo(NamedTuple):
     url='https://github.com/Jayman2000/jasons-pre-commit-hooks',
     hook_ids=('unreleased-commit-checker',)
 )
+PCR_NIXFMT: Final = PreCommitRepoInfo(
+    # Normally, I would use the upstream repo’s URL, but I can’t because
+    # this pull request [1] hasn’t been merged yet.
+    #
+    # [1]: <https://github.com/NixOS/nixfmt/pull/238>
+    url='https://github.com/Jayman2000/nixfmt-pr',
+    hook_ids=('nixfmt',)
+)
 PRE_COMMIT_REPOS_BY_PATH: Final = (
     (('**',), PCR_REUSE),
     (('.pre-commit-hooks.yaml',), PCR_PRE_COMMIT_UPDATE),
@@ -214,6 +222,7 @@ class PreCommitRepoInfo(NamedTuple):
     (PYTHON_GLOBS, PCR_RUFF),
     (('.pre-commit-hooks.yaml',), PCR_PRE_COMMIT_ITSELF),
     (('VERSIONING.md',), PCR_UNRELEASED_COMMIT_CHECKER),
+    (('**.nix',), PCR_NIXFMT),
 )