{ lib, stdenv, qbe }:
let
  platform = lib.toLower stdenv.hostPlatform.uname.system;
  arch = stdenv.hostPlatform.uname.processor;
  qbePlatform = {
    x86_64 = "amd64_sysv";
    aarch64 = "arm64";
    riscv64 = "rv64";
  }.${arch};
in
stdenv.mkDerivation  (finalAttrs: {
  pname = "harec";
  version = "0.24";
  src = builtins.fetchGit {
    url = "github.com/hshq/harelang-harec";
    ref = "master";
    rev = "51446fdef8b39df1fbf4fa2644d3f51f020f974a";
  };
  buildInputs = [ qbe ];
  nativeBuildInputs = [ qbe ];

  makeFlags = [
    "PREFIX=${builtins.placeholder "out"}"
    "ARCH=${arch}"
    "VERSION=${finalAttrs.version}-nixpkgs"
    "QBEFLAGS=-t${qbePlatform}"
    "CC=${stdenv.cc.targetPrefix}cc"
    "AS=${stdenv.cc.targetPrefix}as"
    "LD=${stdenv.cc.targetPrefix}ld"
  ];

  postConfigure = ''
    ln -s configs/darwin.mk config.mk
  '';
})