License Report for installed packages

[kaihowl]

Description

Can the home-manager packages command also output additional "meta" attributes as for example the licenses of the installed packages? I tried recursing of the store entries and get the total transitive closure of my install with either

nix-store --query ~/.nix-profile --graph

or also

nix-store -q --requisites "/nix/store/8fdqpjianfsx9yx7gcj23nv0w51j86s8-home-manager-path"

(modulo the hash of course).

With the store entries I cannot get back the original flakes / meta attributes it seems, though. All of this is lost and not stored?

The nix cookbook has some basic license checking idea linked, but I fail to make the connection the home-manager packages.

1. Is there a way to recover the original meta attributes from the store entries (nix question, not home-manager specific)
2. Could the home-manager packages command be extended to make use of this information?
3. Alternatively: How would I extend the home.nix to produce a list of packages with their licenses upon instantiation?