haskell.compiler.ghc941: bootstrap using (binary) GHC 8.10.7

This shortens the bootstrap chain for 9.4.1 and should be kinder on
rebuilds. It requires some messing around in the configure file, since
it is not officially supported by upstream (but known to work). For now
it saves us the hassle of adding another bindist to nixpkgs. When we
support hadrian, we'll be able to use the already packaged 9.2.2
bindist.

pkgs/development/compilers/ghc/9.4.1.nix

@@ -264,6 +264,13 @@ stdenv.mkDerivation (rec {
           --replace '*-android*|*-gnueabi*)' \
                     '*-android*|*-gnueabi*|*-musleabi*)'
       done
+  ''
+  # HACK: allow bootstrapping with GHC 8.10 which works fine, as we don't have
+  # binary 9.0 packaged. Bootstrapping with 9.2 is broken without hadrian.
+  + ''
+    substituteInPlace configure --replace \
+      'MinBootGhcVersion="9.0"' \
+      'MinBootGhcVersion="8.10"'
   '';
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.

pkgs/top-level/haskell-packages.nix

@@ -157,10 +157,16 @@ in {
     };
     ghc941 = callPackage ../development/compilers/ghc/9.4.1.nix {
       bootPkgs =
-        # TODO(@sternenseemann): Package 9.0.2 bindist or wait for upstream fix
-        # Need to use 902 due to
+        # 9.2 is broken due to
         # https://gitlab.haskell.org/ghc/ghc/-/issues/21914
-          packages.ghc902;
+        # Use 8.10 as a workaround, TODO: maybe package binary 9.0?
+        # aarch ghc8107Binary exceeds max output size on hydra
+        if stdenv.hostPlatform.isAarch then
+          packages.ghc8107BinaryMinimal
+        else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then
+          packages.ghc8107
+        else
+          packages.ghc8107Binary;
       inherit (buildPackages.python3Packages) sphinx;
       # Need to use apple's patched xattr until
       # https://github.com/xattr/xattr/issues/44 and