anchor.diff: -{ stdenv, fetchurl, fetchgit,  znc }:
  +{ stdenv, fetchurl, fetchgit, znc }:
   
   let
  -
     zncDerivation = a@{
       name, src, module_name,
       buildPhase ? "${znc}/bin/znc-buildmod ${module_name}.cpp",
  
positive.code:     };
    };
  
  }
  
negative.code:   });
  
  in rec {
  
    fish = zncDerivation rec {
      name = "znc-fish-8e1f150fda";
  