anchor.diff:  
     buildInputs = [ bash ];
     propagatedBuildInputs = [ boto setuptools distro ];
  -
   
     postPatch = ''
       for file in $(find google_compute_engine -type f); do
  
positive.code: { lib
  , fetchFromGitHub
  , buildPythonApplication
  , bash
  , bashInteractive
  , systemd
  
negative.code: , distro
  }:
  
  buildPythonPackage rec {
    pname = "google-compute-engine";
    version = "20190124";
    namePrefix = "";
  