anchor.diff:  
   pkcs11-helper = callPackage ../all-pkgs/p/pkcs11-helper { };
   
  +pkg-config = callPackage ../all-pkgs/p/pkgconfig { };
  +
   pkgconf = callPackage ../all-pkgs/p/pkgconf { };
  -pkg-config = callPackage ../all-pkgs/p/pkgconfig { };
   pkgconfig = callPackageAlias "pkgconf" { };
   
   plymouth = callPackage ../all-pkgs/p/plymouth { };
  
positive.code: #mesos = callPackage ../all-pkgs/m/mesos {
  #  inherit (pythonPackages) python boto setuptools wrapPython;
  #  pythonProtobuf = pythonPackages.protobuf2_5;
   # perf = linuxPackages.perf;
  #};
  
  mg = callPackage ../all-pkgs/m/mg { };
  
negative.code: 
  powertop = callPackage ../all-pkgs/p/powertop { };
  
  procps = callPackageAlias "procps-ng" { };
  
  procps-ng = callPackage ../all-pkgs/p/procps-ng { };
  
  prometheus = pkgs.goPackages.prometheus.bin // { outputs = [ "bin" ]; };
  
  protobuf-c = callPackage ../all-pkgs/p/protobuf-c { };
  