diff --git a/default.nix b/default.nix
index 50d77c3..9bab938 100644
--- a/default.nix
+++ b/default.nix
@@ -18,6 +18,7 @@ in
       type = "app";
       program =
         (pkgs.writeScript "nix-unit" ''
+          #!/usr/bin/env bash
           ${nix-unit}/bin/nix-unit --flake '.#tests'
         '').outPath;
     };