anchor.diff:  
     enableParallelBuilding = true;
   
  -  configureFlags = [ "PERL=${perl}/bin/perl" ];
  +  configureFlags = [
  +    # used for vfs helpers at run time:
  +    "PERL=${perl}/bin/perl"
  +    # used for .hlp generation at build time:
  +    "PERL_FOR_BUILD=${buildPackages.perl}/bin/perl"
  +  ];
   
     postPatch = ''
       substituteInPlace src/filemanager/ext.c \
  
positive.code:     sha256 = "sha256-6ZTZvppxcumsSkrWIQeSH2qjEuZosFbf5bi867r1OAM=";
    };
  
    nativeBuildInputs = [ pkg-config autoreconfHook unzip ]
      # The preFixup hook rewrites the binary, which invaliates the code
      # signature. Add the fixup hook to sign the output.
  
negative.code: { lib, stdenv
  , fetchurl
  , buildPackages
  , pkg-config
  , glib
  , gpm
  