diff --git a/nix/update-crates.sh b/nix/update-crates.sh
index 17e8152..7d31d3e 100755
--- a/nix/update-crates.sh
+++ b/nix/update-crates.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -i bash -E "with import <nixpkgs> {}; mkShell { nativeBuildInputs = [ (import (builtins.fetchTarball https://github.com/kolloch/crate2nix/archive/0.8.0.tar.gz) {}) ]; }"
+#!nix-shell -i bash -E "with import ./nix {}; mkShell { nativeBuildInputs = [ cacert cargo (import (builtins.fetchTarball https://github.com/kolloch/crate2nix/archive/0.8.0.tar.gz) {}) ]; }"
 set -e
 
 cargo fetch --locked