diff --git a/shell.nix b/shell.nix
old mode 100644
new mode 100755
index ae4b8b4447e69baa1c6d31bef8ad136c6aafa118..076762143e1e854048d4c55ecf26e1a13aa6c9d6
--- a/shell.nix
+++ b/shell.nix
@@ -1,4 +1,4 @@
-#!/usr/bin/env nix-shell --pure
+#!/usr/bin/env -S nix-shell --pure
 
 with import <nixpkgs> {};
 with python38Packages;