anchor.diff:      description = "Git repository organizer and rebase/merge workflow automation tool";
       license = licenses.mit;
       platforms = platforms.all;
  -    maintainers = [ maintainers.blitz ];
  +    maintainers = with maintainers; [ blitz ];
     };
   }
  
positive.code: 
    nativeBuildInputs = [ installShellFiles pbr ];
  
    # TODO: Add missing check inputs (2019-11-22):
    # - stestr
    doCheck = false;
    checkInputs = [ flake8 mock pycodestyle pylint tox ];
  
    postInstall = ''
        installShellCompletion --bash --name git-machete completion/git-machete.completion.bash
  
negative.code: { lib, buildPythonApplication, fetchPypi
  , installShellFiles, pbr
  , flake8, mock, pycodestyle, pylint, stestr, tox
  , nix-update-script
  , testVersion, git-machete
  }:
  