anchor.diff:  , pciutils
   }:
   
  +let
  +  inherit (lib)
  +    optionalString
  +    versionOlder;
  +in
   stdenv.mkDerivation {
     name = "cpupower-${kernel.version}";
   
  
positive.code:     "install-man"
    ];
  
    meta = with stdenv.lib; {
      description = "Tool to examine and tune power saving features";
      homepage = https://www.kernel.org.org/;
      license = licenses.gpl2;
  
negative.code: { stdenv
  , lib
  , fetchurl
  , gettext
  
  