nix-repl> stdenv
«derivation /nix/store/8mgqiwshdp8pvl7agmi1ls6m2ziwp4ag-stdenv-darwin.drv»

nix-repl> pkgs.stdenv
«derivation /nix/store/8mgqiwshdp8pvl7agmi1ls6m2ziwp4ag-stdenv-darwin.drv»

oh that's right, interesting