diff --git a/outputs.nix b/outputs.nix
index c9bbcf0..3458614 100644
--- a/outputs.nix
+++ b/outputs.nix
@@ -41,7 +41,7 @@ in (utils.lib.eachSystem (builtins.filter filter_system utils.lib.defaultSystems
     apps = {
       docs = {
         type = "app";
-        program = builtins.toString (pkgs.writeScript "docs" ''
+        program = builtins.toString (pkgs.writeShellScript "docs" ''
           ${pkgs.mdbook}/bin/mdbook serve --open ./doc
         '');
       };