diff --git a/krebs/3modules/github-hosts-sync.nix b/krebs/3modules/github-hosts-sync.nix
index 9421576df..71eed6c69 100644
--- a/krebs/3modules/github-hosts-sync.nix
+++ b/krebs/3modules/github-hosts-sync.nix
@@ -66,11 +66,14 @@ let
 
     users.users.${user.name} = {
       inherit (user) uid;
+      group = user.name;
       home = cfg.dataDir;
       isSystemUser = true;
     };
   };
 
+  users.groups.${user.name} = {};
+
   user = rec {
     mail = "${name}@${config.krebs.build.host.name}";
     name = "github-hosts-sync";