diff --git a/contrib/nixos/modules/copyparty.nix b/contrib/nixos/modules/copyparty.nix
index 3725f8e4..2f13f07b 100644
--- a/contrib/nixos/modules/copyparty.nix
+++ b/contrib/nixos/modules/copyparty.nix
@@ -279,6 +279,7 @@ in {
             "/nix/store"
             "-/etc/resolv.conf"
             "-/etc/nsswitch.conf"
+            "-/etc/group"
             "-/etc/hosts"
             "-/etc/localtime"
           ]