anchor.diff:    checkPhase = attrs.checkPhase or ''
         runHook preCheck
   
  +      # reduce output to only dots, if a test fails error output will include verbose info
         ${python}/bin/${python.executable} setup.py test -q
   
         runHook postCheck
  
positive.code: 
      export PYTHONPATH="$out/lib/${python.libPrefix}/site-packages:$PYTHONPATH"
  
      ${python}/bin/${python.executable} setup.py install --install-lib=$out/lib/${python.libPrefix}/site-packages \
                                                          --prefix="$out" ${lib.concatStringsSep " " setupPyInstallFlags}
  
      # A pth file might have been generated to load the package from
      # within its own site-packages, rename this package not to
  
negative.code: 
  { name
  
  # by default prefix `name` e.g. "python3.3-${name}"
  , namePrefix ? python.libPrefix + "-"
  
  , buildInputs ? []
  
  # pass extra information to the distutils global configuration (think as global setup.cfg)
  , distutilsExtraCfg ? ""
  
  # propagate build dependencies so in case we have A -> B -> C,
  # C can import propagated packages by A
  , propagatedBuildInputs ? []
  
  # passed to "python setup.py install"
  