haskell.packages.*.ghcWithPackages: Fix on darwin (#415434)

    else

      "$out/lib/${ghc.targetPrefix}${ghc.haskellCompilerName}"

      + lib.optionalString (ghc ? hadrian) "/lib";

  # Boot libraries for GHC are present in a separate directory.

  bootLibDir =

    let

      arch = if stdenv.targetPlatform.isAarch64 then "aarch64" else "x86_64";

      platform = if stdenv.targetPlatform.isDarwin then "osx" else "linux";

    in

    "${ghc}/lib/${ghc.haskellCompilerName}/lib/${arch}-${platform}-${ghc.haskellCompilerName}";

  docDir = "$out/share/doc/ghc/html";

  packageCfgDir = "${libDir}/package.conf.d";

  paths = lib.concatLists (

          # symlinkJoin:

          rm -f $dynamicLinksDir/*

          # Boot libraries are located differently than other libraries since GHC 9.6, so handle them separately.

          if [[ -x "${bootLibDir}" ]]; then

            find "${bootLibDir}" -name '*.dylib' -exec ln -s {} "$dynamicLinksDir" \;

          fi

          dynamicLibraryDirs=()

          for d in $(grep -Poz "dynamic-library-dirs:\s*\K .+\n" $packageConfDir/*|awk '{print $2}'|sort -u); do

            find "$d" -name '*.dylib' -exec ln -s {} "$dynamicLinksDir" \;

          for pkg in $($out/bin/ghc-pkg list --simple-output); do

            dynamicLibraryDirs+=($($out/bin/ghc-pkg --simple-output field "$pkg" dynamic-library-dirs))

          done

          for dynamicLibraryDir in $(echo "''${dynamicLibraryDirs[@]}" | tr ' ' '\n' | sort -u); do

            echo "Linking $dynamicLibraryDir/*.dylib from $dynamicLinksDir"

            find "$dynamicLibraryDir" -name '*.dylib' -exec ln -s {} "$dynamicLinksDir" \;

          done

          for f in $packageConfDir/*.conf; do

            # Initially, $f is a symlink to a read-only file in one of the inputs

            # (as a result of this symlinkJoin derivation).