nixpkgs/pkgs/development/compilers/ghcjs/head_shims.nix

{ fetchFromGitHub }:
fetchFromGitHub {
  owner = "ghcjs";
  repo = "shims";
  rev = "85395dce971e23a39e5f93af4ed139ca36d4e448";
  sha256 = "1kqgik75jx681s1kjx1s7dryigr3m940c3zb9vy0r3psxrw6sf2g";
}