xfsprogs: patch python shebangs for xfs_scrub_all and xfs_protofile

pkgs/by-name/xf/xfsprogs/package.nix

@@ -12,6 +12,7 @@
   inih,
   liburcu,
   nixosTests,
+  python3,
 }:
 
 stdenv.mkDerivation rec {
@@ -23,6 +24,11 @@ stdenv.mkDerivation rec {
     hash = "sha256-Ww9WqB9kEyYmb3Yq6KVjsp2Vzbzag7x5OPaM4SLx7dk=";
   };
 
+  postPatch = ''
+    substituteInPlace {./scrub/xfs_scrub_all.py.in,./mkfs/xfs_protofile.py.in}\
+      --replace-fail '#!/usr/bin/python3' '#!/usr/bin/env python3'
+  '';
+
   outputs = [
     "bin"
     "dev"
@@ -43,6 +49,7 @@ stdenv.mkDerivation rec {
     icu
     inih
     liburcu
+    (python3.withPackages (ps: [ ps.dbus-python ]))
   ];
   propagatedBuildInputs = [ libuuid ]; # Dev headers include <uuid/uuid.h>