final: prev:
with prev; {

  binutils-unwrapped = prev.binutils-unwrapped.overrideAttrs (attrs: {
    patches = attrs.patches ++ lib.optional targetPlatform.isGenode
      [ ./binutils/support-genode.patch ];
  });

  cmake = prev.cmake.overrideAttrs (attrs: {
    postInstall = with stdenv;
      if targetPlatform.isGenode then ''
        local MODULE="$out/share/cmake-${
          lib.versions.majorMinor attrs.version
        }/Modules/Platform/Genode.cmake"
        if [ -e "$MODULE" ]; then
            echo "Upstream provides $MODULE!"
            exit 1
        fi
        cp ${./cmake/Genode.cmake} $MODULE
      '' else
        null;

  });

  genodeHeaders = callPackage ./headers { };
  genodeLibcCross = callPackage ./libc { stdenv = crossLibcStdenv; };

  libcCrossChooser = name:
    if stdenv.targetPlatform.isGenode then
      targetPackages.genodeLibcCross or genodeLibcCross
    else
      prev.libcCrossChooser name;

  llvmPackages_8 = callPackage ./llvm-8 ({
    inherit (stdenvAdapters) overrideCC;
    buildLlvmTools = buildPackages.llvmPackages_8.tools;
    targetLlvmLibraries = targetPackages.llvmPackages_8.libraries;
  });

}