depot/third_party/nixpkgs/pkgs/tools/package-management/niff/default.nix

{ lib, stdenv
, python3
, fetchFromGitHub
}:

let
  pname = "niff";
  version = "0.1";
in stdenv.mkDerivation {
  name = "${pname}-${version}";

  src = fetchFromGitHub {
    owner = "FRidh";
    repo = "niff";
    rev = "v${version}";
    sha256 = "1ziv5r57jzg2qg61izvkkyq1bz4p5nb6652dzwykfj3l2r3db4bi";
  };

  buildInputs = [ python3 ];

  dontBuild = true;

  installPhase = ''
    mkdir -p $out/bin
    cp niff $out/bin/niff
  '';

  meta = {
    description = "A program that compares two Nix expressions and determines which attributes changed";
    homepage = "https://github.com/FRidh/niff";
    license = lib.licenses.mit;
    mainProgram = "niff";
  };
}