nixpkgs/pkgs/tools/misc/cowsay/default.nix

{ stdenv, fetchgit, perl }:

stdenv.mkDerivation {
  name = "cowsay-3.03+dfsg1-16";

  src = fetchgit {
    url = https://anonscm.debian.org/git/collab-maint/cowsay.git;
    rev = "acb946c166fa3b9526b9c471ef1330f9f89f9c8b";
    sha256 = "1ji66nrdcc8sh79hwils3nbaj897s352r5wp7kzjwiym8bm2azk6";
  };

  buildInputs = [ perl ];

  installPhase = ''
    bash ./install.sh $out
  '';

  meta = with stdenv.lib; {
    description = "A program which generates ASCII pictures of a cow with a message";
    homepage = https://en.wikipedia.org/wiki/Cowsay;
    license = licenses.gpl1;
    platforms = platforms.all;
    maintainers = [ maintainers.rob ];
  };
}