diff --git a/artiq-fast.nix b/artiq-fast.nix
index 6efacb1..6084efe 100644
--- a/artiq-fast.nix
+++ b/artiq-fast.nix
@@ -39,7 +39,7 @@ let
     (overrides:
     pkgs.writeScriptBin "wfvm-run-windows-tests"
     ''
-    #!${pkgs.bash}/bin/bash
+    ${pkgs.bash}/bin/bash
     echo "Windows tests skipped"
     ''
     )