diff --git a/pkgs/development/compilers/ghc/8.10.7.nix b/pkgs/development/compilers/ghc/8.10.7.nix
index a6694e2e99c9c..bf1c27f2a812e 100644
--- a/pkgs/development/compilers/ghc/8.10.7.nix
+++ b/pkgs/development/compilers/ghc/8.10.7.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
+{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, buildPackages, targetPackages
 
 # build-tools
 , bootPkgs
@@ -39,7 +39,10 @@
   enableShared ? !stdenv.targetPlatform.isWindows && !stdenv.targetPlatform.useiOSPrebuilt
 
 , # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
+  enableTerminfo ? !(stdenv.targetPlatform.isWindows
+                     # terminfo can't be built for cross
+                     || (stdenv.buildPlatform != stdenv.hostPlatform)
+                     || (stdenv.hostPlatform != stdenv.targetPlatform))
 
 , # What flavour to build. An empty string indicates no
   # specific flavour and falls back to ghc default values.
@@ -55,21 +58,29 @@
 
 , enableHaddockProgram ?
     # Disabled for cross; see note [HADDOCK_DOCS].
-    (stdenv.targetPlatform == stdenv.hostPlatform)
+    (stdenv.buildPlatform == stdenv.hostPlatform && stdenv.targetPlatform == stdenv.hostPlatform)
 
 , # Whether to disable the large address space allocator
   # necessary fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
   disableLargeAddressSpace ? stdenv.targetPlatform.isiOS
+
+, # Whether to build an unregisterised version of GHC.
+  # GHC will normally auto-detect whether it can do a registered build, but this
+  # option will force it to do an unregistered build when set to true.
+  # See https://gitlab.haskell.org/ghc/ghc/-/wikis/building/unregisterised
+  enableUnregisterised ? false
 }@args:
 
 assert !enableIntegerSimple -> gmp != null;
 
 # Cross cannot currently build the `haddock` program for silly reasons,
 # see note [HADDOCK_DOCS].
-assert (stdenv.targetPlatform != stdenv.hostPlatform) -> !enableHaddockProgram;
+assert (stdenv.buildPlatform != stdenv.hostPlatform || stdenv.targetPlatform != stdenv.hostPlatform) -> !enableHaddockProgram;
+
+# GHC does not support building when all 3 platforms are different.
+assert stdenv.buildPlatform == stdenv.hostPlatform || stdenv.hostPlatform == stdenv.targetPlatform;
 
 let
-  libffi_name = if stdenv.isDarwin && stdenv.isAarch64 then "libffi" else "libffi_3_3";
   inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
   inherit (bootPkgs) ghc;
@@ -86,6 +97,8 @@ let
     endif
     BUILD_SPHINX_HTML = ${if enableDocs then "YES" else "NO"}
     BUILD_SPHINX_PDF = NO
+
+    WITH_TERMINFO = ${if enableTerminfo then "YES" else "NO"}
   '' +
   # Note [HADDOCK_DOCS]:
   # Unfortunately currently `HADDOCK_DOCS` controls both whether the `haddock`
@@ -134,7 +147,9 @@ let
     pkgsBuildTarget.targetPackages.stdenv.cc
   ] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
 
+  buildCC = buildPackages.stdenv.cc;
   targetCC = builtins.head toolsForTarget;
+  installCC = pkgsHostTarget.targetPackages.stdenv.cc;
 
   # toolPath calculates the absolute path to the name tool associated with a
   # given `stdenv.cc` derivation, i.e. it picks the correct derivation to take
@@ -185,14 +200,37 @@ let
     (lib.optionalString enableIntegerSimple "-integer-simple")
   ];
 
-in
+  libffi_name = if stdenv.isDarwin && stdenv.isAarch64 then "libffi" else "libffi_3_3";
+
+  # These libraries are library dependencies of the standard libraries bundled
+  # by GHC (core libs) users will link their compiled artifacts again. Thus,
+  # they should be taken from targetPackages.
+  #
+  # We need to use pkgsHostTarget if we are cross compiling a native GHC compiler,
+  # though (when native compiling GHC, pkgsHostTarget == targetPackages):
+  #
+  # 1. targetPackages would be empty(-ish) in this situation since we can't
+  #    execute cross compiled compilers in order to obtain the libraries
+  #    that would be in targetPackages.
+  # 2. pkgsHostTarget is fine to use since hostPlatform == targetPlatform in this
+  #    situation.
+  # 3. The core libs used by the final GHC (stage 2) for user artifacts are also
+  #    used to build stage 2 GHC itself, i.e. the core libs are both host and
+  #    target.
+  targetLibs =
+    let
+      basePackageSet =
+        if hostPlatform != targetPlatform
+        then targetPackages
+        else pkgsHostTarget;
+    in
+      {
+        inherit (basePackageSet) gmp;
+        # dynamic inherits are not possible in Nix
+        libffi = basePackageSet.${libffi_name};
+      };
 
-# C compiler, bintools and LLVM are used at build time, but will also leak into
-# the resulting GHC's settings file and used at runtime. This means that we are
-# currently only able to build GHC if hostPlatform == buildPlatform.
-assert targetCC == pkgsHostTarget.targetPackages.stdenv.cc;
-assert buildTargetLlvmPackages.llvm == llvmPackages.llvm;
-assert stdenv.targetPlatform.isDarwin -> buildTargetLlvmPackages.clang == llvmPackages.clang;
+in
 
 stdenv.mkDerivation (rec {
   version = "8.10.7";
@@ -299,6 +337,10 @@ stdenv.mkDerivation (rec {
     # LLVM backend on Darwin needs clang: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
     export CLANG="${buildTargetLlvmPackages.clang}/bin/${buildTargetLlvmPackages.clang.targetPrefix}clang"
   '' + ''
+    # No need for absolute paths since these tools only need to work during the build
+    export CC_STAGE0="$CC_FOR_BUILD"
+    export LD_STAGE0="$LD_FOR_BUILD"
+    export AR_STAGE0="$AR_FOR_BUILD"
 
     echo -n "${buildMK}" > mk/build.mk
     sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
@@ -329,21 +371,23 @@ stdenv.mkDerivation (rec {
       done
   '';
 
+  # Although it is usually correct to pass --host, we don't do that here because
+  # GHC's usage of build, host, and target is non-standard.
+  # See https://gitlab.haskell.org/ghc/ghc/-/wikis/building/cross-compiling
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ]
-    ++ lib.optional (targetPlatform != hostPlatform) "target";
+  configurePlatforms = [ "build" ]
+    ++ lib.optional (buildPlatform != hostPlatform || targetPlatform != hostPlatform) "target";
 
   # `--with` flags for libraries needed for RTS linker
   configureFlags = [
     "--datadir=$doc/share/doc/ghc"
-    "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${ncurses.out}/lib"
   ] ++ lib.optionals (args.${libffi_name} != null) [
     "--with-system-libffi"
-    "--with-ffi-includes=${targetPackages.${libffi_name}.dev}/include"
-    "--with-ffi-libraries=${targetPackages.${libffi_name}.out}/lib"
+    "--with-ffi-includes=${targetLibs.libffi.dev}/include"
+    "--with-ffi-libraries=${targetLibs.libffi.out}/lib"
   ] ++ lib.optionals (targetPlatform == hostPlatform && !enableIntegerSimple) [
-    "--with-gmp-includes=${targetPackages.gmp.dev}/include"
-    "--with-gmp-libraries=${targetPackages.gmp.out}/lib"
+    "--with-gmp-includes=${targetLibs.gmp.dev}/include"
+    "--with-gmp-libraries=${targetLibs.gmp.out}/lib"
   ] ++ lib.optionals (targetPlatform == hostPlatform && hostPlatform.libc != "glibc" && !targetPlatform.isWindows) [
     "--with-iconv-includes=${libiconv}/include"
     "--with-iconv-libraries=${libiconv}/lib"
@@ -355,6 +399,8 @@ stdenv.mkDerivation (rec {
     "CONF_GCC_LINKER_OPTS_STAGE2=-fuse-ld=gold"
   ] ++ lib.optionals (disableLargeAddressSpace) [
     "--disable-large-address-space"
+  ] ++ lib.optionals enableUnregisterised [
+    "--enable-unregisterised"
   ];
 
   # Make sure we never relax`$PATH` and hooks support for compatibility.
@@ -366,12 +412,19 @@ stdenv.mkDerivation (rec {
   nativeBuildInputs = [
     perl autoreconfHook autoconf automake m4 python3
     ghc bootPkgs.alex bootPkgs.happy bootPkgs.hscolour
+    bootPkgs.ghc-settings-edit
   ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
     autoSignDarwinBinariesHook
   ] ++ lib.optionals enableDocs [
     sphinx
   ];
 
+  # Used by the STAGE0 compiler to build stage1
+  depsBuildBuild = [
+    buildCC
+    # stage0 builds terminfo unconditionally, so we always need ncurses
+    ncurses
+  ];
   # For building runtime libs
   depsBuildTarget = toolsForTarget;
 
@@ -402,6 +455,35 @@ stdenv.mkDerivation (rec {
   requiredSystemFeatures = [ "big-parallel" ];
 
   postInstall = ''
+    settingsFile="$out/lib/${targetPrefix}${passthru.haskellCompilerName}/settings"
+
+    # Make the installed GHC use the host->target tools.
+    ghc-settings-edit "$settingsFile" \
+      "C compiler command" "${toolPath "cc" installCC}" \
+      "Haskell CPP command" "${toolPath "cc" installCC}" \
+      "C++ compiler command" "${toolPath "c++" installCC}" \
+      "ld command" "${toolPath "ld${lib.optionalString useLdGold ".gold"}" installCC}" \
+      "Merge objects command" "${toolPath "ld${lib.optionalString useLdGold ".gold"}" installCC}" \
+      "ar command" "${toolPath "ar" installCC}" \
+      "ranlib command" "${toolPath "ranlib" installCC}"
+  ''
+  + lib.optionalString (stdenv.targetPlatform.linker == "cctools") ''
+    ghc-settings-edit "$settingsFile" \
+      "otool command" "${toolPath "otool" installCC}" \
+      "install_name_tool command" "${toolPath "install_name_tool" installCC}"
+  ''
+  + lib.optionalString useLLVM ''
+    ghc-settings-edit "$settingsFile" \
+      "LLVM llc command" "${lib.getBin llvmPackages.llvm}/bin/llc" \
+      "LLVM opt command" "${lib.getBin llvmPackages.llvm}/bin/opt"
+  ''
+  # FIXME(@sternenseemann): use installCC instead if possible
+  + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
+    ghc-settings-edit "$settingsFile" \
+      "LLVM clang command" "${llvmPackages.clang}/bin/${llvmPackages.clang.targetPrefix}clang"
+  ''
+  + ''
+
     # Install the bash completion file.
     install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/${targetPrefix}ghc
   '';
@@ -427,7 +509,8 @@ stdenv.mkDerivation (rec {
       guibou
     ] ++ lib.teams.haskell.members;
     timeout = 24 * 3600;
-    inherit (ghc.meta) license platforms;
+    platforms = lib.platforms.all;
+    inherit (ghc.meta) license;
   };
 
 } // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
diff --git a/pkgs/development/compilers/ghc/common-hadrian.nix b/pkgs/development/compilers/ghc/common-hadrian.nix
index b6d4d7236fe6b..f9b24f291aaa0 100644
--- a/pkgs/development/compilers/ghc/common-hadrian.nix
+++ b/pkgs/development/compilers/ghc/common-hadrian.nix
@@ -12,6 +12,7 @@
 , stdenv
 , pkgsBuildTarget
 , pkgsHostTarget
+, buildPackages
 , targetPackages
 , fetchpatch
 
@@ -65,8 +66,14 @@
   enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic && !isGhcjs
 
 , # Whether to build terminfo.
+  # FIXME(@sternenseemann): This actually doesn't influence what hadrian does,
+  # just what buildInputs etc. looks like. It would be best if we could actually
+  # tell it what to do like it was possible with make.
   enableTerminfo ? !(stdenv.targetPlatform.isWindows
-                     || stdenv.targetPlatform.isGhcjs)
+                     || stdenv.targetPlatform.isGhcjs
+                     # terminfo can't be built for cross
+                     || (stdenv.buildPlatform != stdenv.hostPlatform)
+                     || (stdenv.hostPlatform != stdenv.targetPlatform))
 
 , # Libdw.c only supports x86_64, i686 and s390x as of 2022-08-04
   enableDwarf ? (stdenv.targetPlatform.isx86 ||
@@ -117,9 +124,8 @@
     -- no way to set this via the command line
     finalStage :: Stage
     finalStage = ${
-      # Always build the stage 2 compiler if possible. Note we can currently
-      # assume hostPlatform == buildPlatform.
-      # TODO(@sternenseemann): improve this condition when we can cross-compile GHC
+      # Always build the stage 2 compiler if possible.
+      # TODO(@sternensemann): unify condition with make-built GHCs
       if stdenv.hostPlatform.canExecute stdenv.targetPlatform
       then "Stage2" # native compiler or “native” cross e.g. pkgsStatic
       else "Stage1" # cross compiler
@@ -222,10 +228,22 @@
 , # Whether to disable the large address space allocator
   # necessary fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
   disableLargeAddressSpace ? stdenv.targetPlatform.isiOS
+
+, # Whether to build an unregisterised version of GHC.
+  # GHC will normally auto-detect whether it can do a registered build, but this
+  # option will force it to do an unregistered build when set to true.
+  # See https://gitlab.haskell.org/ghc/ghc/-/wikis/building/unregisterised
+  enableUnregisterised ? false
 }:
 
 assert !enableNativeBignum -> gmp != null;
 
+# GHC does not support building when all 3 platforms are different.
+assert stdenv.buildPlatform == stdenv.hostPlatform || stdenv.hostPlatform == stdenv.targetPlatform;
+
+# It is currently impossible to cross-compile GHC with Hadrian.
+assert stdenv.buildPlatform == stdenv.hostPlatform;
+
 let
   inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
@@ -265,7 +283,9 @@ let
      else pkgsBuildTarget.targetPackages.stdenv.cc)
   ] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
 
+  buildCC = buildPackages.stdenv.cc;
   targetCC = builtins.head toolsForTarget;
+  installCC = pkgsHostTarget.targetPackages.stdenv.cc;
 
   # toolPath calculates the absolute path to the name tool associated with a
   # given `stdenv.cc` derivation, i.e. it picks the correct derivation to take
@@ -316,14 +336,33 @@ let
     (lib.optionalString enableNativeBignum "-native-bignum")
   ];
 
-in
+  # These libraries are library dependencies of the standard libraries bundled
+  # by GHC (core libs) users will link their compiled artifacts again. Thus,
+  # they should be taken from targetPackages.
+  #
+  # We need to use pkgsHostTarget if we are cross compiling a native GHC compiler,
+  # though (when native compiling GHC, pkgsHostTarget == targetPackages):
+  #
+  # 1. targetPackages would be empty(-ish) in this situation since we can't
+  #    execute cross compiled compilers in order to obtain the libraries
+  #    that would be in targetPackages.
+  # 2. pkgsHostTarget is fine to use since hostPlatform == targetPlatform in this
+  #    situation.
+  # 3. The core libs used by the final GHC (stage 2) for user artifacts are also
+  #    used to build stage 2 GHC itself, i.e. the core libs are both host and
+  #    target.
+  targetLibs = {
+    inherit
+      (if hostPlatform != targetPlatform then targetPackages else pkgsHostTarget)
+      elfutils
+      gmp
+      libffi;
+  };
 
-# C compiler, bintools and LLVM are used at build time, but will also leak into
-# the resulting GHC's settings file and used at runtime. This means that we are
-# currently only able to build GHC if hostPlatform == buildPlatform.
-assert !targetPlatform.isGhcjs -> targetCC == pkgsHostTarget.targetPackages.stdenv.cc;
-assert buildTargetLlvmPackages.llvm == llvmPackages.llvm;
-assert stdenv.targetPlatform.isDarwin -> buildTargetLlvmPackages.clang == llvmPackages.clang;
+  # Our Cabal compiler name
+  haskellCompilerName = "ghc-${version}";
+
+in
 
 stdenv.mkDerivation ({
   pname = "${targetPrefix}ghc${variantSuffix}";
@@ -346,6 +385,10 @@ stdenv.mkDerivation ({
     for env in $(env | grep '^TARGET_' | sed -E 's|\+?=.*||'); do
       export "''${env#TARGET_}=''${!env}"
     done
+    # No need for absolute paths since these tools only need to work during the build
+    export CC_STAGE0="$CC_FOR_BUILD"
+    export LD_STAGE0="$LD_FOR_BUILD"
+    export AR_STAGE0="$AR_FOR_BUILD"
     # GHC is a bit confused on its cross terminology, as these would normally be
     # the *host* tools.
     export CC="${toolPath "cc" targetCC}"
@@ -433,14 +476,13 @@ stdenv.mkDerivation ({
   # `--with` flags for libraries needed for RTS linker
   configureFlags = [
     "--datadir=$doc/share/doc/ghc"
-    "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${ncurses.out}/lib"
   ] ++ lib.optionals (libffi != null && !targetPlatform.isGhcjs) [
     "--with-system-libffi"
-    "--with-ffi-includes=${targetPackages.libffi.dev}/include"
-    "--with-ffi-libraries=${targetPackages.libffi.out}/lib"
+    "--with-ffi-includes=${targetLibs.libffi.dev}/include"
+    "--with-ffi-libraries=${targetLibs.libffi.out}/lib"
   ] ++ lib.optionals (targetPlatform == hostPlatform && !enableNativeBignum) [
-    "--with-gmp-includes=${targetPackages.gmp.dev}/include"
-    "--with-gmp-libraries=${targetPackages.gmp.out}/lib"
+    "--with-gmp-includes=${targetLibs.gmp.dev}/include"
+    "--with-gmp-libraries=${targetLibs.gmp.out}/lib"
   ] ++ lib.optionals (targetPlatform == hostPlatform && hostPlatform.libc != "glibc" && !targetPlatform.isWindows) [
     "--with-iconv-includes=${libiconv}/include"
     "--with-iconv-libraries=${libiconv}/lib"
@@ -454,14 +496,16 @@ stdenv.mkDerivation ({
     "--disable-large-address-space"
   ] ++ lib.optionals enableDwarf [
     "--enable-dwarf-unwind"
-    "--with-libdw-includes=${lib.getDev targetPackages.elfutils}/include"
-    "--with-libdw-libraries=${lib.getLib targetPackages.elfutils}/lib"
+    "--with-libdw-includes=${lib.getDev targetLibs.elfutils}/include"
+    "--with-libdw-libraries=${lib.getLib targetLibs.elfutils}/lib"
   ] ++ lib.optionals targetPlatform.isDarwin [
     # Darwin uses llvm-ar. GHC will try to use `-L` with `ar` when it is `llvm-ar`
     # but it doesn’t currently work because Cabal never uses `-L` on Darwin. See:
     # https://gitlab.haskell.org/ghc/ghc/-/issues/23188
     # https://github.com/haskell/cabal/issues/8882
     "fp_cv_prog_ar_supports_dash_l=no"
+  ] ++ lib.optionals enableUnregisterised [
+    "--enable-unregisterised"
   ];
 
   # Make sure we never relax`$PATH` and hooks support for compatibility.
@@ -476,6 +520,8 @@ stdenv.mkDerivation ({
     autoconf automake m4
     # Python is used in a few scripts invoked by hadrian to generate e.g. rts headers.
     python3
+    # Tool used to update GHC's settings file in postInstall
+    bootPkgs.ghc-settings-edit
   ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
     autoSignDarwinBinariesHook
   ] ++ lib.optionals enableDocs [
@@ -484,6 +530,12 @@ stdenv.mkDerivation ({
 
   # For building runtime libs
   depsBuildTarget = toolsForTarget;
+  # Used by the STAGE0 compiler to build stage1
+  depsBuildBuild = [
+    buildCC
+    # stage0 builds terminfo unconditionally, so we always need ncurses
+    ncurses
+  ];
 
   buildInputs = [ perl bash ] ++ (libDeps hostPlatform);
 
@@ -553,19 +605,52 @@ stdenv.mkDerivation ({
     # leave bindist directory
     popd
 
+    settingsFile="$out/lib/${targetPrefix}${haskellCompilerName}/lib/settings"
+
+    # Make the installed GHC use the host->target tools.
+    ghc-settings-edit "$settingsFile" \
+      "C compiler command" "${toolPath "cc" installCC}" \
+      "Haskell CPP command" "${toolPath "cc" installCC}" \
+      "C++ compiler command" "${toolPath "c++" installCC}" \
+      "ld command" "${toolPath "ld${lib.optionalString useLdGold ".gold"}" installCC}" \
+      "Merge objects command" "${toolPath "ld${lib.optionalString useLdGold ".gold"}" installCC}" \
+      "ar command" "${toolPath "ar" installCC}" \
+      "ranlib command" "${toolPath "ranlib" installCC}"
+  ''
+  + lib.optionalString (stdenv.targetPlatform.linker == "cctools") ''
+    ghc-settings-edit "$settingsFile" \
+      "otool command" "${toolPath "otool" installCC}" \
+      "install_name_tool command" "${toolPath "install_name_tool" installCC}"
+  ''
+  + lib.optionalString useLLVM ''
+    ghc-settings-edit "$settingsFile" \
+      "LLVM llc command" "${lib.getBin llvmPackages.llvm}/bin/llc" \
+      "LLVM opt command" "${lib.getBin llvmPackages.llvm}/bin/opt"
+  ''
+  # FIXME(@sternenseemann): use installCC instead if possible
+  + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
+    ghc-settings-edit "$settingsFile" \
+      "LLVM clang command" "${llvmPackages.clang}/bin/${llvmPackages.clang.targetPrefix}clang"
+  ''
+  # Work around a GHC bug which causes unlit to be installed under a different
+  # name than is used in the settings file.
+  # https://gitlab.haskell.org/ghc/ghc/-/issues/23317
+  + lib.optionalString (lib.versionOlder version "9.8") ''
+    ghc-settings-edit "$settingsFile" \
+      "unlit command" "\$topdir/bin/${targetPrefix}unlit"
+  ''
+  + ''
+
     # Install the bash completion file.
     install -Dm 644 utils/completion/ghc.bash $out/share/bash-completion/completions/${targetPrefix}ghc
   '';
 
   passthru = {
-    inherit bootPkgs targetPrefix;
+    inherit bootPkgs targetPrefix haskellCompilerName;
 
     inherit llvmPackages;
     inherit enableShared;
 
-    # Our Cabal compiler name
-    haskellCompilerName = "ghc-${version}";
-
     # Expose hadrian used for bootstrapping, for debugging purposes
     inherit hadrian;
 
@@ -581,7 +666,8 @@ stdenv.mkDerivation ({
       guibou
     ] ++ lib.teams.haskell.members;
     timeout = 24 * 3600;
-    inherit (ghc.meta) license platforms;
+    platforms = lib.platforms.all;
+    inherit (ghc.meta) license;
   };
 
   dontStrip = targetPlatform.useAndroidPrebuilt || targetPlatform.isWasm;
diff --git a/pkgs/development/compilers/ghc/common-make-native-bignum.nix b/pkgs/development/compilers/ghc/common-make-native-bignum.nix
index 2b23cd75a0ed7..03d7697e2de39 100644
--- a/pkgs/development/compilers/ghc/common-make-native-bignum.nix
+++ b/pkgs/development/compilers/ghc/common-make-native-bignum.nix
@@ -3,7 +3,7 @@
 , url ? "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz"
 }:
 
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
+{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, buildPackages, targetPackages
 
 # build-tools
 , bootPkgs
@@ -42,7 +42,10 @@
   enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
 
 , # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
+  enableTerminfo ? !(stdenv.targetPlatform.isWindows
+                     # terminfo can't be built for cross
+                     || (stdenv.buildPlatform != stdenv.hostPlatform)
+                     || (stdenv.hostPlatform != stdenv.targetPlatform))
 
 , # What flavour to build. An empty string indicates no
   # specific flavour and falls back to ghc default values.
@@ -58,18 +61,29 @@
 
 , enableHaddockProgram ?
     # Disabled for cross; see note [HADDOCK_DOCS].
-    (stdenv.targetPlatform == stdenv.hostPlatform)
+    (stdenv.buildPlatform == stdenv.hostPlatform && stdenv.targetPlatform == stdenv.hostPlatform)
 
 , # Whether to disable the large address space allocator
   # necessary fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
   disableLargeAddressSpace ? stdenv.targetPlatform.isiOS
+
+, # Whether to build an unregisterised version of GHC.
+  # GHC will normally auto-detect whether it can do a registered build, but this
+  # option will force it to do an unregistered build when set to true.
+  # See https://gitlab.haskell.org/ghc/ghc/-/wikis/building/unregisterised
+  # Registerised RV64 compiler produces programs that segfault
+  # See https://gitlab.haskell.org/ghc/ghc/-/issues/23957
+  enableUnregisterised ? stdenv.hostPlatform.isRiscV64 || stdenv.targetPlatform.isRiscV64
 }:
 
 assert !enableNativeBignum -> gmp != null;
 
 # Cross cannot currently build the `haddock` program for silly reasons,
 # see note [HADDOCK_DOCS].
-assert (stdenv.targetPlatform != stdenv.hostPlatform) -> !enableHaddockProgram;
+assert (stdenv.buildPlatform != stdenv.hostPlatform || stdenv.targetPlatform != stdenv.hostPlatform) -> !enableHaddockProgram;
+
+# GHC does not support building when all 3 platforms are different.
+assert stdenv.buildPlatform == stdenv.hostPlatform || stdenv.hostPlatform == stdenv.targetPlatform;
 
 let
   inherit (stdenv) buildPlatform hostPlatform targetPlatform;
@@ -88,6 +102,8 @@ let
     endif
     BUILD_SPHINX_HTML = ${if enableDocs then "YES" else "NO"}
     BUILD_SPHINX_PDF = NO
+
+    WITH_TERMINFO = ${if enableTerminfo then "YES" else "NO"}
   '' +
   # Note [HADDOCK_DOCS]:
   # Unfortunately currently `HADDOCK_DOCS` controls both whether the `haddock`
@@ -134,7 +150,9 @@ let
     pkgsBuildTarget.targetPackages.stdenv.cc
   ] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
 
+  buildCC = buildPackages.stdenv.cc;
   targetCC = builtins.head toolsForTarget;
+  installCC = pkgsHostTarget.targetPackages.stdenv.cc;
 
   # toolPath calculates the absolute path to the name tool associated with a
   # given `stdenv.cc` derivation, i.e. it picks the correct derivation to take
@@ -185,14 +203,29 @@ let
     (lib.optionalString enableNativeBignum "-native-bignum")
   ];
 
-in
+  # These libraries are library dependencies of the standard libraries bundled
+  # by GHC (core libs) users will link their compiled artifacts again. Thus,
+  # they should be taken from targetPackages.
+  #
+  # We need to use pkgsHostTarget if we are cross compiling a native GHC compiler,
+  # though (when native compiling GHC, pkgsHostTarget == targetPackages):
+  #
+  # 1. targetPackages would be empty(-ish) in this situation since we can't
+  #    execute cross compiled compilers in order to obtain the libraries
+  #    that would be in targetPackages.
+  # 2. pkgsHostTarget is fine to use since hostPlatform == targetPlatform in this
+  #    situation.
+  # 3. The core libs used by the final GHC (stage 2) for user artifacts are also
+  #    used to build stage 2 GHC itself, i.e. the core libs are both host and
+  #    target.
+  targetLibs = {
+    inherit
+      (if hostPlatform != targetPlatform then targetPackages else pkgsHostTarget)
+      gmp
+      libffi;
+  };
 
-# C compiler, bintools and LLVM are used at build time, but will also leak into
-# the resulting GHC's settings file and used at runtime. This means that we are
-# currently only able to build GHC if hostPlatform == buildPlatform.
-assert targetCC == pkgsHostTarget.targetPackages.stdenv.cc;
-assert buildTargetLlvmPackages.llvm == llvmPackages.llvm;
-assert stdenv.targetPlatform.isDarwin -> buildTargetLlvmPackages.clang == llvmPackages.clang;
+in
 
 stdenv.mkDerivation (rec {
   pname = "${targetPrefix}ghc${variantSuffix}";
@@ -305,6 +338,11 @@ stdenv.mkDerivation (rec {
     export CLANG="${buildTargetLlvmPackages.clang}/bin/${buildTargetLlvmPackages.clang.targetPrefix}clang"
   ''
   + ''
+    # No need for absolute paths since these tools only need to work during the build
+    export CC_STAGE0="$CC_FOR_BUILD"
+    export LD_STAGE0="$LD_FOR_BUILD"
+    export AR_STAGE0="$AR_FOR_BUILD"
+
     echo -n "${buildMK}" > mk/build.mk
   ''
   + lib.optionalString (lib.versionOlder version "9.2" || lib.versionAtLeast version "9.4") ''
@@ -346,21 +384,23 @@ stdenv.mkDerivation (rec {
       'MinBootGhcVersion="8.10"'
   '';
 
+  # Although it is usually correct to pass --host, we don't do that here because
+  # GHC's usage of build, host, and target is non-standard.
+  # See https://gitlab.haskell.org/ghc/ghc/-/wikis/building/cross-compiling
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ]
-    ++ lib.optional (targetPlatform != hostPlatform) "target";
+  configurePlatforms = [ "build" ]
+    ++ lib.optional (buildPlatform != hostPlatform || targetPlatform != hostPlatform) "target";
 
   # `--with` flags for libraries needed for RTS linker
   configureFlags = [
     "--datadir=$doc/share/doc/ghc"
-    "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${ncurses.out}/lib"
   ] ++ lib.optionals (libffi != null) [
     "--with-system-libffi"
-    "--with-ffi-includes=${targetPackages.libffi.dev}/include"
-    "--with-ffi-libraries=${targetPackages.libffi.out}/lib"
+    "--with-ffi-includes=${targetLibs.libffi.dev}/include"
+    "--with-ffi-libraries=${targetLibs.libffi.out}/lib"
   ] ++ lib.optionals (targetPlatform == hostPlatform && !enableNativeBignum) [
-    "--with-gmp-includes=${targetPackages.gmp.dev}/include"
-    "--with-gmp-libraries=${targetPackages.gmp.out}/lib"
+    "--with-gmp-includes=${targetLibs.gmp.dev}/include"
+    "--with-gmp-libraries=${targetLibs.gmp.out}/lib"
   ] ++ lib.optionals (targetPlatform == hostPlatform && hostPlatform.libc != "glibc" && !targetPlatform.isWindows) [
     "--with-iconv-includes=${libiconv}/include"
     "--with-iconv-libraries=${libiconv}/lib"
@@ -372,6 +412,8 @@ stdenv.mkDerivation (rec {
     "CONF_GCC_LINKER_OPTS_STAGE2=-fuse-ld=gold"
   ] ++ lib.optionals (disableLargeAddressSpace) [
     "--disable-large-address-space"
+  ] ++ lib.optionals enableUnregisterised [
+    "--enable-unregisterised"
   ];
 
   # Make sure we never relax`$PATH` and hooks support for compatibility.
@@ -383,6 +425,7 @@ stdenv.mkDerivation (rec {
   nativeBuildInputs = [
     perl autoconf automake m4 python3
     ghc bootPkgs.alex bootPkgs.happy bootPkgs.hscolour
+    bootPkgs.ghc-settings-edit
   ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
     autoSignDarwinBinariesHook
   ] ++ lib.optionals enableDocs [
@@ -393,6 +436,12 @@ stdenv.mkDerivation (rec {
     xattr
   ];
 
+  # Used by the STAGE0 compiler to build stage1
+  depsBuildBuild = [
+    buildCC
+    # stage0 builds terminfo unconditionally, so we always need ncurses
+    ncurses
+  ];
   # For building runtime libs
   depsBuildTarget = toolsForTarget;
 
@@ -423,6 +472,35 @@ stdenv.mkDerivation (rec {
   requiredSystemFeatures = [ "big-parallel" ];
 
   postInstall = ''
+    settingsFile="$out/lib/${targetPrefix}${passthru.haskellCompilerName}/settings"
+
+    # Make the installed GHC use the host->target tools.
+    ghc-settings-edit "$settingsFile" \
+      "C compiler command" "${toolPath "cc" installCC}" \
+      "Haskell CPP command" "${toolPath "cc" installCC}" \
+      "C++ compiler command" "${toolPath "c++" installCC}" \
+      "ld command" "${toolPath "ld${lib.optionalString useLdGold ".gold"}" installCC}" \
+      "Merge objects command" "${toolPath "ld${lib.optionalString useLdGold ".gold"}" installCC}" \
+      "ar command" "${toolPath "ar" installCC}" \
+      "ranlib command" "${toolPath "ranlib" installCC}"
+  ''
+  + lib.optionalString (stdenv.targetPlatform.linker == "cctools") ''
+    ghc-settings-edit "$settingsFile" \
+      "otool command" "${toolPath "otool" installCC}" \
+      "install_name_tool command" "${toolPath "install_name_tool" installCC}"
+  ''
+  + lib.optionalString useLLVM ''
+    ghc-settings-edit "$settingsFile" \
+      "LLVM llc command" "${lib.getBin llvmPackages.llvm}/bin/llc" \
+      "LLVM opt command" "${lib.getBin llvmPackages.llvm}/bin/opt"
+  ''
+  # FIXME(@sternenseemann): use installCC instead if possible
+  + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
+    ghc-settings-edit "$settingsFile" \
+      "LLVM clang command" "${llvmPackages.clang}/bin/${llvmPackages.clang.targetPrefix}clang"
+  ''
+  + ''
+
     # Install the bash completion file.
     install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/${targetPrefix}ghc
   '';
@@ -448,7 +526,8 @@ stdenv.mkDerivation (rec {
       guibou
     ] ++ lib.teams.haskell.members;
     timeout = 24 * 3600;
-    inherit (ghc.meta) license platforms;
+    platforms = lib.platforms.all;
+    inherit (ghc.meta) license;
   };
 
 } // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
diff --git a/pkgs/development/haskell-modules/non-hackage-packages.nix b/pkgs/development/haskell-modules/non-hackage-packages.nix
index bb995435fc600..c5cfbcec0313b 100644
--- a/pkgs/development/haskell-modules/non-hackage-packages.nix
+++ b/pkgs/development/haskell-modules/non-hackage-packages.nix
@@ -17,6 +17,8 @@ self: super: {
   # from the latest master instead of the current version on Hackage.
   cabal2nix-unstable = self.callPackage ./cabal2nix-unstable.nix { };
 
+  ghc-settings-edit = self.callPackage ../tools/haskell/ghc-settings-edit { };
+
   # https://github.com/channable/vaultenv/issues/1
   vaultenv = self.callPackage ../tools/haskell/vaultenv { };
 
diff --git a/pkgs/development/tools/haskell/ghc-settings-edit/default.nix b/pkgs/development/tools/haskell/ghc-settings-edit/default.nix
new file mode 100644
index 0000000000000..f1f08b620588c
--- /dev/null
+++ b/pkgs/development/tools/haskell/ghc-settings-edit/default.nix
@@ -0,0 +1,33 @@
+{
+  stdenv,
+  ghc,
+  lib,
+}:
+
+stdenv.mkDerivation {
+  pname = "ghc-settings-edit";
+  version = "0.1.0";
+  # See the source code for an explanation
+  src = ./ghc-settings-edit.lhs;
+  dontUnpack = true;
+  dontBuild = true;
+
+  nativeBuildInputs = [ ghc ];
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p "$out/bin"
+    ${ghc.targetPrefix}ghc --make "$src" -o "$out/bin/ghc-settings-edit"
+
+    runHook postInstall
+  '';
+
+  meta = {
+    license = [
+      lib.licenses.mit
+      lib.licenses.bsd3
+    ];
+    platforms = lib.platforms.all;
+    description = "Tool for editing GHC's settings file";
+  };
+}
diff --git a/pkgs/development/tools/haskell/ghc-settings-edit/ghc-settings-edit.lhs b/pkgs/development/tools/haskell/ghc-settings-edit/ghc-settings-edit.lhs
new file mode 100644
index 0000000000000..3b37bafe0d622
--- /dev/null
+++ b/pkgs/development/tools/haskell/ghc-settings-edit/ghc-settings-edit.lhs
@@ -0,0 +1,109 @@
+ghc-settings-edit is a small tool for changing certain fields in the settings
+file that is part of every GHC installation (usually located at
+lib/ghc-$version/lib/settings or lib/ghc-$version/settings). This is sometimes
+necessary because GHC's build process leaks the tools used at build time into
+the final settings file. This is fine, as long as the build and host platform
+of the GHC build is the same since it will be possible to execute the tools
+used at build time at run time. In case we are cross compiling GHC itself,
+the settings file needs to be changed so that the correct tools are used in the
+final installation. The GHC build system itself doesn't allow for this due to
+its somewhat peculiar bootstrapping mechanism.
+
+This tool was originally written by sternenseemann and is licensed under the MIT
+license (as is nixpkgs) as well as the BSD 3 Clause license since it incorporates
+some code from GHC. It is primarily intended for use in nixpkgs, so it should be
+considered unstable: No guarantees about the stability of its command line
+interface are made at this time.
+
+> -- SPDX-License-Identifier: MIT AND BSD-3-Clause
+> {-# LANGUAGE LambdaCase #-}
+> module Main where
+
+ghc-settings-edit requires no additional dependencies to the ones already
+required to bootstrap GHC. This means that it only depends on GHC and core
+libraries shipped with the compiler (base and containers). This property should
+be preserved going forward as to not needlessly complicate bootstrapping GHC
+in nixpkgs. Additionally, a wide range of library versions and thus GHC versions
+should be supported (via CPP if necessary).
+
+> import Control.Monad (foldM)
+> import qualified Data.Map.Lazy as Map
+> import System.Environment (getArgs, getProgName)
+> import Text.Read (readEither)
+
+Note that the containers dependency is needed to represent the contents of the
+settings file. In theory, [(String, String)] (think lookup) would suffice, but
+base doesn't provide any facilities for updating such lists. To avoid needlessly
+reinventing the wheel here, we depend on an extra core library.
+
+> type SettingsMap = Map.Map String String
+
+ghc-settings-edit accepts the following arguments:
+
+- The path to the settings file which is edited in place.
+- For every field in the settings file to be updated, two arguments need to be
+  passed: the name of the field and its new value. Any number of these pairs
+  may be provided. If a field is missing from the given settings file,
+  it won't be added (see also below).
+
+> usage :: String -> String
+> usage name = "Usage: " ++ name ++ " FILE [KEY NEWVAL [KEY2 NEWVAL2 ...]]"
+
+The arguments and the contents of the settings file are fed into the performEdits
+function which implements the main logic of ghc-settings-edit (except IO).
+
+> performEdits :: [String] -> String -> Either String String
+> performEdits editArgs settingsString = do
+
+First, the settings file is parsed and read into the SettingsMap structure. For
+parsing, we can simply rely read, as GHC uses the familiar Read/Show format
+(plus some formatting) for storing its settings. This is the main reason
+ghc-settings-edit is written in Haskell: We don't need to roll our own parser.
+
+>   settingsMap <- Map.fromList <$> readEither settingsString
+
+We also need to parse the remaining command line arguments (after the path)
+which means splitting them into pairs of arguments describing the individual
+edits. We use the chunkList utility function from GHC for this which is vendored
+below. Since it doesn't guarantee that all sublists have the exact length given,
+we'll have to check the length of the returned “pairs” later.
+
+>   let edits = chunkList 2 editArgs
+
+Since each edit is a transformation of the SettingsMap, we use a fold to go
+through the edits. The Either monad allows us to bail out if one is malformed.
+The use of Map.adjust ensures that fields that aren't present in the original
+settings file aren't added since the corresponding GHC installation wouldn't
+understand them. Note that this is done silently which may be suboptimal:
+It could be better to fail.
+
+>   show . Map.toList <$> foldM applyEdit settingsMap edits
+>   where
+>     applyEdit :: SettingsMap -> [String] -> Either String SettingsMap
+>     applyEdit m [key, newValue] = Right $ Map.adjust (const newValue) key m
+>     applyEdit _ _ = Left "Uneven number of edit arguments provided"
+
+main just wraps performEdits and takes care of reading from and writing to the
+given file.
+
+> main :: IO ()
+> main =
+>   getArgs >>= \case
+>     (settingsFile:edits) -> do
+>       orig <- readFile settingsFile
+>       case performEdits edits orig of
+>         Right edited -> writeFile settingsFile edited
+>         Left errorMsg -> error errorMsg
+>     _ -> do
+>            name <- getProgName
+>            error $ usage name
+
+As mentioned, chunkList is taken from GHC, specifically GHC.Utils.Misc of GHC
+verson 9.8.2. We don't depend on the ghc library directly (which would be
+possible in theory) since there are no stability guarantees or deprecation
+windows for the ghc's public library.
+
+> -- | Split a list into chunks of /n/ elements
+> chunkList :: Int -> [a] -> [[a]]
+> chunkList _ [] = []
+> chunkList n xs = as : chunkList n bs where (as,bs) = splitAt n xs
diff --git a/pkgs/test/cross/default.nix b/pkgs/test/cross/default.nix
index bd233db4cd50f..f07e9c6220de7 100644
--- a/pkgs/test/cross/default.nix
+++ b/pkgs/test/cross/default.nix
@@ -146,6 +146,8 @@ let
     pkgs.pkgsCross.mips64el-linux-gnuabi64.stdenv
     pkgs.pkgsCross.mips64el-linux-gnuabin32.stdenv
     pkgs.pkgsCross.mingwW64.stdenv
+    # Uses the expression that is used by the most cross-compil_ed_ GHCs
+    pkgs.pkgsCross.riscv64.haskell.compiler.native-bignum.ghc948
 
   ] ++ lib.optionals (with pkgs.stdenv.buildPlatform; isx86_64 && isLinux) [
     # Musl-to-glibc cross on the same architecture tends to turn up
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 6193d9d217ae9..2d54063e00746 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1,4 +1,4 @@
-{ buildPackages, pkgsBuildTarget, pkgs, newScope, stdenv }:
+{ buildPackages, pkgsBuildBuild, pkgsBuildTarget, pkgs, newScope, stdenv }:
 
 let
   # These are attributes in compiler that support integer-simple.
@@ -52,7 +52,8 @@ in {
 
   package-list = callPackage ../development/haskell-modules/package-list.nix {};
 
-  compiler = {
+  # Always get boot compilers from `pkgsBuildBuild`
+  compiler = let bb = pkgsBuildBuild.haskell; in {
     ghc865Binary = callPackage ../development/compilers/ghc/8.6.5-binary.nix {
       # Should be llvmPackages_6 which has been removed from nixpkgs
       llvmPackages = null;
@@ -73,11 +74,11 @@ in {
     ghc8107 = callPackage ../development/compilers/ghc/8.10.7.nix {
       bootPkgs =
         # the oldest ghc with aarch64-darwin support is 8.10.5
-        if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
+        if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
           # to my (@a-m-joseph) knowledge there are no newer official binaries for this platform
-          packages.ghc865Binary
+          bb.packages.ghc865Binary
         else
-          packages.ghc8107Binary;
+          bb.packages.ghc8107Binary;
       inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
       python3 = buildPackages.python311; # so that we don't have two of them
       # Need to use apple's patched xattr until
@@ -91,10 +92,10 @@ in {
     ghc902 = callPackage ../development/compilers/ghc/9.0.2.nix {
       bootPkgs =
         # the oldest ghc with aarch64-darwin support is 8.10.5
-        if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc810
+        if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc810
         else
-          packages.ghc8107Binary;
+          bb.packages.ghc8107Binary;
       inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
       python3 = buildPackages.python311; # so that we don't have two of them
       inherit (buildPackages.darwin) autoSignDarwinBinariesHook xattr;
@@ -104,10 +105,10 @@ in {
     ghc90 = compiler.ghc902;
     ghc925 = callPackage ../development/compilers/ghc/9.2.5.nix {
       bootPkgs =
-        if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc810
+        if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc810
         else
-          packages.ghc8107Binary;
+          bb.packages.ghc8107Binary;
       inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
       python3 = buildPackages.python311; # so that we don't have two of them
       # Need to use apple's patched xattr until
@@ -119,10 +120,10 @@ in {
     };
     ghc926 = callPackage ../development/compilers/ghc/9.2.6.nix {
       bootPkgs =
-        if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc810
+        if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc810
         else
-          packages.ghc8107Binary;
+          bb.packages.ghc8107Binary;
       inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
       python3 = buildPackages.python311; # so that we don't have two of them
       # Need to use apple's patched xattr until
@@ -134,10 +135,10 @@ in {
     };
     ghc927 = callPackage ../development/compilers/ghc/9.2.7.nix {
       bootPkgs =
-        if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc810
+        if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc810
         else
-          packages.ghc8107Binary;
+          bb.packages.ghc8107Binary;
       inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
       python3 = buildPackages.python311; # so that we don't have two of them
       # Need to use apple's patched xattr until
@@ -149,10 +150,10 @@ in {
     };
     ghc928 = callPackage ../development/compilers/ghc/9.2.8.nix {
       bootPkgs =
-        if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc810
+        if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc810
         else
-          packages.ghc8107Binary;
+          bb.packages.ghc8107Binary;
       inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
       python3 = buildPackages.python311; # so that we don't have two of them
       # Need to use apple's patched xattr until
@@ -170,14 +171,14 @@ in {
         # Use 8.10 as a workaround where possible to keep bootstrap path short.
 
         # On ARM text won't build with GHC 8.10.*
-        if stdenv.hostPlatform.isAarch then
+        if stdenv.buildPlatform.isAarch then
           # TODO(@sternenseemann): package bindist
-          packages.ghc902
+          bb.packages.ghc902
         # No suitable bindists for powerpc64le
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc902
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc902
         else
-          packages.ghc8107Binary;
+          bb.packages.ghc8107Binary;
       inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
       python3 = buildPackages.python311; # so that we don't have two of them
       # Need to use apple's patched xattr until
@@ -195,14 +196,14 @@ in {
         # Use 8.10 as a workaround where possible to keep bootstrap path short.
 
         # On ARM text won't build with GHC 8.10.*
-        if stdenv.hostPlatform.isAarch then
+        if stdenv.buildPlatform.isAarch then
           # TODO(@sternenseemann): package bindist
-          packages.ghc902
+          bb.packages.ghc902
         # No suitable bindists for powerpc64le
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc902
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc902
         else
-          packages.ghc8107Binary;
+          bb.packages.ghc8107Binary;
       inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
       python3 = buildPackages.python311; # so that we don't have two of them
       # Need to use apple's patched xattr until
@@ -220,14 +221,14 @@ in {
         # Use 8.10 as a workaround where possible to keep bootstrap path short.
 
         # On ARM text won't build with GHC 8.10.*
-        if stdenv.hostPlatform.isAarch then
+        if stdenv.buildPlatform.isAarch then
           # TODO(@sternenseemann): package bindist
-          packages.ghc902
+          bb.packages.ghc902
         # No suitable bindists for powerpc64le
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc902
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc902
         else
-          packages.ghc8107Binary;
+          bb.packages.ghc8107Binary;
       inherit (buildPackages.python3Packages) sphinx;
       # Need to use apple's patched xattr until
       # https://github.com/xattr/xattr/issues/44 and
@@ -244,14 +245,14 @@ in {
         # Use 8.10 as a workaround where possible to keep bootstrap path short.
 
         # On ARM text won't build with GHC 8.10.*
-        if stdenv.hostPlatform.isAarch then
+        if stdenv.buildPlatform.isAarch then
           # TODO(@sternenseemann): package bindist
-          packages.ghc902
+          bb.packages.ghc902
         # No suitable bindists for powerpc64le
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc902
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc902
         else
-          packages.ghc8107Binary;
+          bb.packages.ghc8107Binary;
       inherit (buildPackages.python3Packages) sphinx;
       # Need to use apple's patched xattr until
       # https://github.com/xattr/xattr/issues/44 and
@@ -265,12 +266,12 @@ in {
     ghc963 = callPackage ../development/compilers/ghc/9.6.3.nix {
       bootPkgs =
         # For GHC 9.2 no armv7l bindists are available.
-        if stdenv.hostPlatform.isAarch32 then
-          packages.ghc928
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc928
+        if stdenv.buildPlatform.isAarch32 then
+          bb.packages.ghc928
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc928
         else
-          packages.ghc924Binary;
+          bb.packages.ghc924Binary;
       inherit (buildPackages.python3Packages) sphinx;
       # Need to use apple's patched xattr until
       # https://github.com/xattr/xattr/issues/44 and
@@ -283,12 +284,12 @@ in {
     ghc964 = callPackage ../development/compilers/ghc/9.6.4.nix {
       bootPkgs =
         # For GHC 9.2 no armv7l bindists are available.
-        if stdenv.hostPlatform.isAarch32 then
-          packages.ghc928
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc928
+        if stdenv.buildPlatform.isAarch32 then
+          bb.packages.ghc928
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc928
         else
-          packages.ghc924Binary;
+          bb.packages.ghc924Binary;
       inherit (buildPackages.python3Packages) sphinx;
       # Need to use apple's patched xattr until
       # https://github.com/xattr/xattr/issues/44 and
@@ -301,12 +302,12 @@ in {
     ghc965 = callPackage ../development/compilers/ghc/9.6.5.nix {
       bootPkgs =
         # For GHC 9.2 no armv7l bindists are available.
-        if stdenv.hostPlatform.isAarch32 then
-          packages.ghc928
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc928
+        if stdenv.buildPlatform.isAarch32 then
+          bb.packages.ghc928
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc928
         else
-          packages.ghc924Binary;
+          bb.packages.ghc924Binary;
       inherit (buildPackages.python3Packages) sphinx;
       # Need to use apple's patched xattr until
       # https://github.com/xattr/xattr/issues/44 and
@@ -319,12 +320,12 @@ in {
     ghc966 = callPackage ../development/compilers/ghc/9.6.6.nix {
       bootPkgs =
         # For GHC 9.2 no armv7l bindists are available.
-        if stdenv.hostPlatform.isAarch32 then
-          packages.ghc928
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc928
+        if stdenv.buildPlatform.isAarch32 then
+          bb.packages.ghc928
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc928
         else
-          packages.ghc924Binary;
+          bb.packages.ghc924Binary;
       inherit (buildPackages.python3Packages) sphinx;
       # Need to use apple's patched xattr until
       # https://github.com/xattr/xattr/issues/44 and
@@ -338,12 +339,12 @@ in {
     ghc981 = callPackage ../development/compilers/ghc/9.8.1.nix {
       bootPkgs =
         # For GHC 9.6 no armv7l bindists are available.
-        if stdenv.hostPlatform.isAarch32 then
-          packages.ghc963
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc963
+        if stdenv.buildPlatform.isAarch32 then
+          bb.packages.ghc963
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc963
         else
-          packages.ghc963Binary;
+          bb.packages.ghc963Binary;
       inherit (buildPackages.python3Packages) sphinx;
       # Need to use apple's patched xattr until
       # https://github.com/xattr/xattr/issues/44 and
@@ -356,12 +357,12 @@ in {
     ghc982 = callPackage ../development/compilers/ghc/9.8.2.nix {
       bootPkgs =
         # For GHC 9.6 no armv7l bindists are available.
-        if stdenv.hostPlatform.isAarch32 then
-          packages.ghc963
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc963
+        if stdenv.buildPlatform.isAarch32 then
+          bb.packages.ghc963
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc963
         else
-          packages.ghc963Binary;
+          bb.packages.ghc963Binary;
       inherit (buildPackages.python3Packages) sphinx;
       # Need to use apple's patched xattr until
       # https://github.com/xattr/xattr/issues/44 and
@@ -375,19 +376,19 @@ in {
     ghc9101 = callPackage ../development/compilers/ghc/9.10.1.nix {
       bootPkgs =
         # For GHC 9.6 no armv7l bindists are available.
-        if stdenv.hostPlatform.isAarch32 then
-          packages.ghc963
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc963
-        else if stdenv.hostPlatform.isDarwin then
+        if stdenv.buildPlatform.isAarch32 then
+          bb.packages.ghc963
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc963
+        else if stdenv.buildPlatform.isDarwin then
           # it seems like the GHC 9.6.* bindists are built with a different
           # toolchain than we are using (which I'm guessing from the fact
           # that 9.6.4 bindists pass linker flags our ld doesn't support).
           # With both 9.6.3 and 9.6.4 binary it is impossible to link against
           # the clock package (probably a hsc2hs problem).
-          packages.ghc963
+          bb.packages.ghc963
         else
-          packages.ghc963Binary;
+          bb.packages.ghc963Binary;
       inherit (buildPackages.python3Packages) sphinx;
       # Need to use apple's patched xattr until
       # https://github.com/xattr/xattr/issues/44 and
@@ -401,12 +402,12 @@ in {
     ghcHEAD = callPackage ../development/compilers/ghc/head.nix {
       bootPkgs =
         # For GHC 9.6 no armv7l bindists are available.
-        if stdenv.hostPlatform.isAarch32 then
-          packages.ghc963
-        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
-          packages.ghc963
+        if stdenv.buildPlatform.isAarch32 then
+          bb.packages.ghc963
+        else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
+          bb.packages.ghc963
         else
-          packages.ghc963Binary;
+          bb.packages.ghc963Binary;
       inherit (buildPackages.python3Packages) sphinx;
       # Need to use apple's patched xattr until
       # https://github.com/xattr/xattr/issues/44 and
@@ -419,7 +420,7 @@ in {
 
     ghcjs = compiler.ghcjs810;
     ghcjs810 = callPackage ../development/compilers/ghcjs/8.10 {
-      bootPkgs = packages.ghc810;
+      bootPkgs = bb.packages.ghc810;
       ghcjsSrcJson = ../development/compilers/ghcjs/8.10/git.json;
       stage0 = ../development/compilers/ghcjs/8.10/stage0.nix;
     };