diff --git a/pkgs/build-support/vm/default.nix b/pkgs/build-support/vm/default.nix
index 5c3d66595af..2f8afb1f388 100644
--- a/pkgs/build-support/vm/default.nix
+++ b/pkgs/build-support/vm/default.nix
@@ -1,7 +1,10 @@
 { pkgs
 , linuxKernel ? pkgs.linux
 , img ? "bzImage"
-, rootModules ? [ "cifs" "virtio_net" "virtio_pci" "virtio_blk" "virtio_balloon" "nls_utf8" "ext2" "ext3" "unix" ]
+, rootModules ?
+    [ "cifs" "virtio_net" "virtio_pci" "virtio_blk" "virtio_balloon" "nls_utf8" "ext2" "ext3"
+      "unix" "hmac" "md4" "ecb" "des_generic"
+    ]
 }:
 
 with pkgs;