Fix incorrect user conversion

lib/modules/users.nix

@@ -96,10 +96,17 @@
                 if builtins.elem name (builtins.attrNames linuxOptions)
                 then {}
                 else {
-                  ${capitalize name} = options;
-                }) cfg.users) // {
+                  ${capitalize name} = (lib.attrsets.concatMapAttrs (
+                    name: value:
+                      if builtins.elem name (builtins.attrNames linuxOptions)
+                      then {}
+                      else {
+                        ${name} = value;
+                      }
+                  ) options) // {
                     groups = [];
                   };
+                }) cfg.users);
         };
       };
     };