anchor.diff:        src = fetchgit {
           url = "https://review.coreboot.org/coreboot";
           rev = version;
  -        sha256 = "073n8yid3v0l9wgwnrdqrlgzaj9mnhs33a007dgr7xq3z0iw3i52";
  +        sha256 = "sha256-PCum+IvJ136eZQLovUi9u4xTLLs17MkMP5Oc0/2mMY4=";
           fetchSubmodules = false;
           leaveDotGit = true;
           postFetch = ''
  -          patchShebangs $out/util/crossgcc/buildgcc
  -          PATH=${lib.makeBinPath [ getopt ]}:$PATH $out/util/crossgcc/buildgcc -W > $out/.crossgcc_version
  +          PATH=${lib.makeBinPath [ getopt ]}:$PATH ${stdenv.shell} $out/util/crossgcc/buildgcc -W > $out/.crossgcc_version
             rm -rf $out/.git
           '';
           allowedRequisites = [ ];
  
positive.code: { lib, callPackage }:
  let
    common = arch: callPackage (
      { bison
  
negative.code:       dontInstall = true;
  
        postPatch = ''
          patchShebangs $out/util/crossgcc/buildgcc
  
          mkdir -p util/crossgcc/tarballs
  
          ${lib.concatMapStringsSep "\n" (
  