debootstrap: Add xz to PATH to support archives that only publish Packages.xz

pkgs/tools/misc/debootstrap/default.nix

@@ -1,5 +1,5 @@
 { lib, stdenv, fetchFromGitLab, dpkg, gawk, perl, wget, coreutils, util-linux
-, gnugrep, gnupg1, gnutar, gnused, gzip, makeWrapper }:
+, gnugrep, gnupg1, gnutar, gnused, gzip, xz, makeWrapper }:
 # USAGE like this: debootstrap sid /tmp/target-chroot-directory
 # There is also cdebootstrap now. Is that easier to maintain?
 let binPath = lib.makeBinPath [
@@ -13,6 +13,7 @@ let binPath = lib.makeBinPath [
     gzip
     perl
     wget
+    xz
   ];
 in stdenv.mkDerivation rec {
   pname = "debootstrap";