anchor.diff:    gn = callPackage ../development/tools/build-managers/gn { };
   
     nixbang = callPackage ../development/tools/misc/nixbang {
  -      pythonPackages = python3Packages;
  +    pythonPackages = python3Packages;
     };
   
     nexus = callPackage ../development/tools/repository-managers/nexus { };
  
positive.code: 
    rdf4store = callPackage ../servers/http/4store { };
  
    apacheHttpd = pkgs.apacheHttpd_2_4;
    apacheHttpd_2_4 = callPackage ../servers/http/apache-httpd/2.4.nix { };
  
    apacheHttpdPackagesFor = apacheHttpd: self: let callPackage = newScope self; in {
      inherit apacheHttpd;
  
negative.code:     subversion = pkgs.subversion.override { httpServer = true; inherit apacheHttpd; };
    };
  
    apacheHttpdPackages_2_4 = apacheHttpdPackagesFor pkgs.apacheHttpd_2_4 pkgs.apacheHttpdPackages_2_4;
    apacheHttpdPackages = apacheHttpdPackages_2_4;
  
    appdaemon = callPackage ../servers/home-assistant/appdaemon.nix { };
  
  