anchor.diff:      echo "installing \`${name}' with \`easy_install'..."
       export PYTHONPATH="$out/lib/${python.libPrefix}/site-packages:$PYTHONPATH"
       easy_install --prefix="$out" .
  +
  +    ${postInstall}
     '';
   
     postFixup = ''
  
positive.code:   //
  
    (rec {
    inherit src meta patches doCheck;
  
    name = namePrefix + attrs.name;
  
  
negative.code: 
    buildPhase = "true";
  
    # XXX: Should we run `easy_install --always-unzip'?  It doesn't seem
    # to have a noticeable impact on small scripts.
    installPhase = ''
  