{ callPackage, symlinkJoin, lib }:
let
  nixpkgsRoot = "@nixpkgs_root@";
  version = "@flutter_version@";
  engineVersion = "@engine_version@";

  systemPlatforms = [
    "x86_64-linux"
    "aarch64-linux"
  ];

  derivations =
    lib.foldl'
      (
        acc: buildPlatform:
          acc
          ++ (map
            (targetPlatform:
              callPackage "${nixpkgsRoot}/pkgs/development/compilers/flutter/engine/source.nix" {
                targetPlatform = lib.systems.elaborate targetPlatform;
                hostPlatform = lib.systems.elaborate buildPlatform;
                buildPlatform = lib.systems.elaborate buildPlatform;

                flutterVersion = version;
                version = engineVersion;
                url = "https://github.com/flutter/engine.git@${engineVersion}";
                hashes."${buildPlatform}"."${targetPlatform}" = lib.fakeSha256;
              })
            systemPlatforms)
      ) [ ]
      systemPlatforms;
in
symlinkJoin {
  name = "evaluate-derivations";
  paths = derivations;
}