anchor.diff:  { stdenv
  -, autogen
   , bison
   , fetchTritonPatch
   , fetchurl
   , flex
   , makeWrapper
  +, python2
   
   , dejavu-fonts
   , efibootmgr
   , freetype
   , fuse_2
   , gettext
  -, libusb_1
   , lvm2
  -, ncurses
   , xz
   , zfs
   
  
positive.code:     any
      mapAttrsToList
      optionals
      optionalString;
  
    typeMap = {
      "bios-i386" = {
  
negative.code:     srcVerification = fetchurl {
        failEarly = true;
        inherit (src) name urls outputHash outputHashAlgo;
        fullOpts = {
          pgpsigUrl = map (n: "${n}.sig") src.urls;
          pgpKeyFingerprint = "E53D 497F 3FA4 2AD8 C9B4  D1E8 35A9 3B74 E82E 4209";
        };
      };
    };
  
  