diff --git a/nixops/common-users.nix b/nixops/common-users.nix
index a4bcd0a..af52619 100644
--- a/nixops/common-users.nix
+++ b/nixops/common-users.nix
@@ -52,6 +52,7 @@
   };
   leo = {
     isNormalUser = true;
+    extraGroups = ["plugdev" "dialout"];
     openssh.authorizedKeys.keys = [
       "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBJk4QyYCzaBPn+ba9TUG8uclB2ikpef5Ddo8a7O5uA2WtK94PCJSx7EThJR22B+KwshbV52R19LxN4Xkd32GDv62f90gMERyMxMrC1hZKJVqvi9HIIYaLaP221pGeW4VnA=="
     ];