Mhm, doesn't sound all that similar to me. This looks like something that needs to be maintained on a per-package basis as a fairly ad-hoc solution for differen

Mhm, doesn't sound all that similar to me. This looks like something that needs to be maintained on a per-package basis as a fairly ad-hoc solution for different library versions, in Nix the whole thing just falls out of the way it's set up in general.