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

{ fetchFromGitHub }:
fetchFromGitHub {
  owner = "ghcjs";
  repo = "shims";
  rev = "dc034a035aa73db2c5be34145732090bd74c1b57";
  sha256 = "18r8kf7g7d2n0rhwcgiz9gsgdmgln1nmwwyj347bpn4zh17qlkqa";
}