diff --git a/pkgs/build-support/vm/default.nix b/pkgs/build-support/vm/default.nix
index b9882914b266..0e21483d034e 100644
--- a/pkgs/build-support/vm/default.nix
+++ b/pkgs/build-support/vm/default.nix
@@ -241,6 +241,7 @@ rec {
         path = /
         read only = no
         guest ok = yes
+        force user = root
       SMB
 
       rm -f ./samba