diff --git a/cmd/welcome/main.go b/cmd/welcome/main.go
index 5b793fe..ab8dc88 100644
--- a/cmd/welcome/main.go
+++ b/cmd/welcome/main.go
@@ -149,7 +149,7 @@ func createUser(data newUserData) (err error) {
 		return fmt.Errorf("usermod failed: %w", err)
 	}
 
-	cmd = exec.Command("sudo", "/town/bin/createkeyfile", data.Username)
+	cmd = exec.Command("sudo", "--user", data.Username, "/town/bin/createkeyfile", data.Username)
 	cmd.Stdin = bytes.NewBufferString(keyfileText(data))
 	if err = cmd.Run(); err != nil {
 		return fmt.Errorf("createkeyfile failed: %w", err)