energizernix-store -q --referrers /nix/store/yb3syfc6v7sbg3n62cyy29ymiyk779ki-nixos-20.09pre239318.c59ea8b8a0e/nixos/pkgs/development/libraries/gstreamer/legacy/gst-plugins-base/default.nix` gave me:

```
/nix/store/38m0m4czl566g6jxzjpqkp21f273sh1l-env-manifest.nix
/nix/store/7vhsb68wwpwnyr7gj7g23nbj08wmbdfx-user-environment
```