anchor.diff:    mesonFlags = [
       "-Dsystemdsystemunitdir=${placeholder "out"}/lib/systemd/system"
       "-Dgtk_doc=true"
  +    "-Dtests=true"
     ];
   
     doCheck = true;
  
positive.code:     owner = "hadess";
      repo = "power-profiles-daemon";
      rev = version;
      sha256 = "sha256-qU9A9U2R3UioC7bo8Pc0IIsHIjghb6gsG4pTAg6tp9E=";
    };
  
    nativeBuildInputs = [
  
negative.code: in
  stdenv.mkDerivation rec {
    pname = "power-profiles-daemon";
    version = "0.12";
  
    outputs = [ "out" "devdoc" ];
  
  