anchor.diff:      substituteInPlace $out/bin/znapzend --replace "${perl}/bin/perl" \
         "${perl}/bin/perl \
         -I${perlPackages.TestHarness}/${perl.libPrefix} \
  -      -I${perlPackages.Mojolicious}/${perl.libPrefix} \
  +      -I${Mojolicious-6-46}/${perl.libPrefix} \
         -I${perlPackages.TAPParserSourceHandlerpgTAP}/${perl.libPrefix} \
  -      -I${perlPackages.MojoIOLoopForkCall}/${perl.libPrefix} \
  +      -I${MojoIOLoopForkCall-0-17}/${perl.libPrefix} \
         -I${perlPackages.IOPipely}/${perl.libPrefix} \
         "
       substituteInPlace $out/bin/znapzendzetup --replace "${perl}/bin/perl" \
         "${perl}/bin/perl \
         -I${perlPackages.TestHarness}/${perl.libPrefix} \
  -      -I${perlPackages.Mojolicious}/${perl.libPrefix} \
  +      -I${Mojolicious-6-46}/${perl.libPrefix} \
         -I${perlPackages.TAPParserSourceHandlerpgTAP}/${perl.libPrefix} \
  -      -I${perlPackages.MojoIOLoopForkCall}/${perl.libPrefix} \
  +      -I${MojoIOLoopForkCall-0-17}/${perl.libPrefix} \
         -I${perlPackages.IOPipely}/${perl.libPrefix} \
         "
       substituteInPlace $out/bin/znapzendztatz --replace "${perl}/bin/perl" \
         "${perl}/bin/perl \
         -I${perlPackages.TestHarness}/${perl.libPrefix} \
  -      -I${perlPackages.Mojolicious}/${perl.libPrefix} \
  +      -I${Mojolicious-6-46}/${perl.libPrefix} \
         -I${perlPackages.TAPParserSourceHandlerpgTAP}/${perl.libPrefix} \
  -      -I${perlPackages.MojoIOLoopForkCall}/${perl.libPrefix} \
  +      -I${MojoIOLoopForkCall-0-17}/${perl.libPrefix} \
         -I${perlPackages.IOPipely}/${perl.libPrefix} \
         "
     '';
  
positive.code:     sha256 = checksum;
    };
  
    buildInputs = [ perl perlPackages.TestHarness perlPackages.Mojolicious
                    perlPackages.TAPParserSourceHandlerpgTAP perlPackages.MojoIOLoopForkCall
                    perlPackages.IOPipely wget ];
  
    nativeBuildInputs = [ autoconf automake ];
  
  
negative.code: { stdenv, fetchFromGitHub, fetchurl, zfs, mbuffer, perl, perlPackages, wget, autoconf, automake }:
  
  let
    Mojolicious-6-46 = perlPackages.buildPerlPackage rec {
      name = "Mojolicious-6.46";
      src = fetchurl {
        url = "mirror://cpan/authors/id/S/SR/SRI/${name}.tar.gz";
        sha256 = "0i3axmx4506fx5gms148pj65x6ys7flaz1aqjd8hd9zfkd8pzdfr";
      };
    };
    MojoIOLoopForkCall-0-17 = perlPackages.buildPerlModule rec {
      name = "Mojo-IOLoop-ForkCall-0.17";
      src = fetchurl {
        url = "mirror://cpan/authors/id/J/JB/JBERGER/${name}.tar.gz";
        sha256 = "090qxz1nbah2qxvfg4whl6yp6q03qkx7a42751iai521nk1yavc8";
      };
      propagatedBuildInputs = [ perlPackages.IOPipely Mojolicious-6-46 ];
    };
  
    version = "0.18.0";
    checksum = "1nlvw56viwgafma506slywfg54z6009jmzc9q6wljgr6mqfmmchd";
  in
  