diff --git a/nixbld-etc-nixos/configuration.nix b/nixbld-etc-nixos/configuration.nix
index f4692fdb..de64c761 100644
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@@ -366,7 +366,6 @@ in
   };
   users.extraUsers.occheung = {
     isNormalUser = true;
-    extraGroups = ["lp" "scanner" "afws"];
     openssh.authorizedKeys.keys = [
       "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBPEvmWmxpFpMgp5fpjKud8ev0cyf/+X5fEpQt/YD/+u4mbvZYPE300DLqQ0h/qjgvaGMz1ndf4idYnRdy+plJEC/+hmlRW5NlcpAr3S/LYAisacgKToFVl+MlBo+emS9Ig=="
     ];
@@ -386,11 +385,11 @@ in
       "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBGtaB32Ri1O7zRVG+1ADXmhwbK0r8R+c5W1RJd7cab5O9jp10wI+0JArFgK8u4m9oaR1rrVy4ym8wWMNu8vGKVTgyK+6UK87qTD96pnzwTyvzKCMOIHVBAPsnVfdOSKXLQ=="
     ];
   };
-  users.extraUsers.yuk = {
+  users.extraUsers.therobs12 = {
     isNormalUser = true;
     extraGroups = ["afws"];
     openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBON6eEML7La1TVKeitvPKpEb+1oqiRZEowILLtNHeUM4l15mAwPK00gZXjdDxq+dTHUjPhRNn8Y4fMPdcCDo/pMD8TsLGzi/p7xh89oPEwJPODWfJcp9pR7fPkuoZV/Vlg=="
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBGKbLMWCWrcUIVDKc7wrkn1Oo1PCH3K0HWIXnPjgASqKdzrNkgrHcg8UsXS0tLKtoYWbWisVUU+V05p6RKMOP7TP6hc2xoVRov6fBMuKHnVJbR9BAkn3O2EaJ7Rlo0y8aQ=="
     ];
   };
   users.extraUsers.nix = {