flake.nix

{
  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
  inputs.nixpkgs11.url = "github:reckenrode/nixpkgs?ref=darwin-stdenv-rework";
  inputs.nixpkgs16.url = "github:reckenrode/nixpkgs?ref=darwin-llvm16-update";

  outputs = { self, nixpkgs11, nixpkgs16, nixpkgs }:
    let
      inherit (nixpkgs) lib;

      mkTest = packages: packages.aarch64-darwin.stdenvNoCC.mkDerivation {
        name = "stdenv_build-test";

        dontUnpack = true;
        dontBuild = true;

        installPhase = lib.concatMapStrings (system:
          let
              pkgs = packages.${system};
          in ''
            outdir=$out/${system}
            mkdir -p "$outdir"
            ln -s ${pkgs.stdenv} "$outdir/stdenv"
          ''
          + ''
            ln -s ${pkgs.e2fsprogs} "$outdir/e2fsprogs"
            ln -s ${pkgs.boost}     "$outdir/boost"
          ''
#          + ''
#            ln -s ${pkgs.ghc}       "$outdir/ghc"
#            ln -s ${pkgs.rustc}     "$outdir/rustc"
#            ln -s ${pkgs.rav1e}     "$outdir/rav1e"
#          ''
        + (lib.concatMapStrings (ver: ''
          ln -s ${pkgs."boost${ver}"} "$outdir/boost${ver}"
        '') [ "175" "177" "178" "179" "180" "181" "182" ])
#        + (lib.concatMapStrings (ver: ''
#          ln -s ${pkgs.haskell.compiler."ghc${ver}"} "$outdir/ghc${ver}"
#        '') (lib.optional (system == "x86_64-darwin") "88" ++ [ "810" "90" "924" "925" "926" "927" "928" "942" "943" "944" "945" "961" "962" ]))
        ) [ "aarch64-darwin" "x86_64-darwin" ];
      };
    in
    {
      packages.aarch64-darwin.clang11 = mkTest nixpkgs11.legacyPackages;
      packages.aarch64-darwin.clang16 = mkTest nixpkgs16.legacyPackages;
      packages.aarch64-darwin.default = nixpkgs.legacyPackages.aarch64-darwin.stdenvNoCC.mkDerivation {
        name = "build_test-output";

        dontUnpack = true;
        dontConfigure = true;

        buildCommand = ''
          mkdir -p "$out"
          ln -s ${self.outputs.packages.aarch64-darwin.clang11} "$out/clang11"
          ln -s ${self.outputs.packages.aarch64-darwin.clang16} "$out/clang16"
        '';
      };
    };
}