I think I got it, but now I have this:

```
[rootenixos: 
/ nix/ store/7r4jhjub4shpi 4brZgZrdnjfgvcalnsr-n1xos-17 
BIB. 21.3B. 4Bbf1f43cd/nixos/pkgs/top-level/impure.nix 
' -show-trace' to show detailed location information) 
```