anchor.diff:  { stdenv, fetchFromGitHub, autoreconfHook, makeWrapper
  -, coreutils, dosfstools, findutils, gawk, gnugrep, grub2_light, ncurses, ntfs3g, parted, utillinux, wget
  +, coreutils, dosfstools, findutils, gawk, gnugrep, grub2_light, ncurses, ntfs3g, parted, p7zip, utillinux, wget
   , wxGTK30 }:
   
   stdenv.mkDerivation rec {
  
positive.code:     # should be patched with a less useless default PATH, but for now
      # we add everything we need manually.
      wrapProgram "$out/bin/woeusb" \
        --set PATH '${stdenv.lib.makeBinPath [ coreutils dosfstools findutils gawk gnugrep grub2_light ncurses ntfs3g parted utillinux wget ]}'
    '';
  
    doInstallCheck = true;
  
negative.code:     sha256 = "0jzgwh9xv92yns5yi5zpl49zbp3csh6m6iclgq070awpjpsqlqi0";
    };
  
    nativeBuildInputs = [ autoreconfHook makeWrapper ];
    buildInputs = [ wxGTK30 ];
  
    postPatch = ''
      # Emulate version smudge filter (see .gitattributes, .gitconfig).
  