Packages can be installed (using nix-env -i) and work as normal, but I can’t get a list of explicitly installed packages. Not sure what other info to provide, let me know and I can attach it.
I have a single-user install on OS X.
Output of nix-env -q --verbose:
evaluating file '/nix/store/5ira7xgs92inqz1x8l0n1wci4r79hnd0-nix-2.3.7/share/nix/corepkgs/derivation.nix'
evaluating file '/nix/store/385hy57ibkm9m7yq19m282mw5f3d6m55-env-manifest.nix'
Contents of /nix/store/385hy57ibkm9m7yq19m282mw5f3d6m55-env-manifest.nix: pastebin