anchor.diff:    gotty = goPackages.gotty.bin // { outputs = [ "bin" ]; };
   
     gradleGen = callPackage ../development/tools/build-managers/gradle { };
  -  gradle = gradleGen.gradleLatest;
  -  gradle25 = gradleGen.gradle25;
  +  gradle = self.gradleGen.gradleLatest;
  +  gradle25 = self.gradleGen.gradle25;
   
     gperf = callPackage ../development/tools/misc/gperf { };
   
  
positive.code:   #
    # The result is `pkgs' where all the derivations depending on `foo'
    # will use the new version.
    overridePackages = f: lib.fix' (lib.extends f pkgs.__unfix__);
  
    # Override system. This is useful to build i686 packages on x86_64-linux.
    forceSystem = system: kernel: (import ./all-packages.nix) {
  
negative.code: 
  
    ### Helper functions.
    inherit lib config stdenvAdapters;
  
    inherit (lib) lowPrio hiPrio appendToName makeOverridable;
    inherit (misc) versionedDerivation;
  