# Pastebin MCB64UnL
with import <nixpkgs> {};

let src = builtins.fetchGit ./.;
in stdenv.mkDerivation {
  name = "foo";
  inherit src;
  installPhase = ''
    mkdir $out
    cp foo.txt $out/foo.txt
    echo ${src.rev} > $out/rev.txt
  '';
}