diff --git a/.envrc b/.envrc
index dc25ec7..fffe92c 100644
--- a/.envrc
+++ b/.envrc
@@ -1,3 +1,4 @@
+#! /usr/bin/env bash
 if ! has nix_direnv_version || ! nix_direnv_version 2.2.1; then
   source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.2.1/direnvrc" "sha256-zelF0vLbEl5uaqrfIzbgNzJWGmLzCmYAkInj/LNxvKs="
 fi