diff --git a/scripts/deploy b/scripts/deploy
index 00a01017d..e8296428a 100755
--- a/scripts/deploy
+++ b/scripts/deploy
@@ -363,9 +363,9 @@ proc main (...args) {
       }
       if (cli.deriv) {
         if (cli.deriv => endsWith(".drv")) {
-          cfg.drvPath = cli.deriv
+          setvar cfg.drvPath = cli.deriv
         } else {
-          cfg.storePath = cli.deriv
+          setvar cfg.storePath = cli.deriv
         }
       }
       call cfgs->append(cfg)