anchor.diff:  { lib
   , buildPythonApplication
   , fetchPypi
  +, installShellFiles
   , mock
   , openstacksdk
   , pbr
  
positive.code:   ];
  
    postInstall = ''
      install -Dm644 tools/swift.bash_completion $out/share/bash_completion.d/swift
    '';
  
    checkPhase = ''
  
negative.code:     hash = "sha256-V7bx/yO0ZoQ4AqaBb0trvGiWtq0F1ld6/udiK+OilTg=";
    };
  
    nativeBuildInputs = [
      installShellFiles
    ];
  
    propagatedBuildInputs = [
      pbr
      python-keystoneclient
  