anchor.diff: -{ lib, stdenv
  +{ lib
  +, stdenv
   , fetchFromGitHub
   , vala
   , atk
  
positive.code:   src = fetchFromGitHub {
      owner = "elementary";
      repo = repoName;
      rev = "05fd6fccdf1a769f6737a0d7e57e092825348660";
      sha256 = "0lqqq5cx0kk8y7qyjx7z2k3v1kw2xxzns968ianarcji19wzcns4";
    };
  
    nativeBuildInputs = [
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "elementary-dock";
    version = "unstable-2021-11-08";
  
    outputs = [ "out" "dev" ];
  
  