anchor.diff:  
           src = nixosSrc;
   
  -        inherit officialRelease;
  +        inherit officialRelease versionSuffix;
   
           buildInputs = [ nixUnstable ];
   
  
positive.code: 
  let
  
  
    makeIso =
      { module, type, description ? type, maintainers ? ["eelco"] }:
      { officialRelease ? false
      , system ? "i686-linux"
      }:
  
      with import <nixpkgs> {inherit system;};
  
      let
  
        version = builtins.readFile ./VERSION + (if officialRelease then "" else "pre${toString nixosSrc.rev}");
  
        versionModule =
          { system.nixosVersion = version;
  
negative.code:           '';
  
          distPhase = ''
            releaseName=nixos-$VERSION$VERSION_SUFFIX
            ensureDir "$out/tarballs"
            mkdir ../$releaseName
            cp -prd . ../$releaseName/nixos
  