anchor.diff: -{ lib, stdenv, fetchgit, flex, bison, python3, autoconf, automake, gnulib, libtool
  +{ lib, stdenv, fetchurl, flex, bison, python3, autoreconfHook, gnulib, libtool
   , gettext, ncurses, libusb-compat-0_1, freetype, qemu, lvm2, unifont, pkg-config
   , buildPackages
   , fetchpatch
  
positive.code:   '';
  
    depsBuildBuild = [ buildPackages.stdenv.cc ];
    nativeBuildInputs = [ bison flex python3 pkg-config autoconf automake gettext freetype ];
    buildInputs = [ ncurses libusb-compat-0_1 freetype lvm2 fuse libtool ]
      ++ optional doCheck qemu
      ++ optional zfsSupport zfs;
  
negative.code:       unset CPP # setting CPP intereferes with dependency calculation
  
        patchShebangs .
  
        substituteInPlace ./configure --replace '/usr/share/fonts/unifont' '${unifont}/share/fonts'
      '';
  