anchor.diff: -{ lib, stdenv
  +{ stdenv
  +, lib
   , fetchFromGitLab
  -, fetchpatch
   , pkg-config
   , glib
   , sqlite
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "zeitgeist";
    version = "1.0.3";
  
    outputs = [ "out" "lib" "dev" "man" ] ++ lib.optional pythonSupport "py";
  
  
negative.code:     owner = pname;
      repo = pname;
      rev = "v${version}";
      sha256 = "kG1N8DXgjYAJ8fbrGHsp7eTqB20H5smzRnW0PSRUYR0=";
    };
  
    nativeBuildInputs = [
      autoconf
  