NetBSD's pkgsrc has always done extremely well for me for that. I'm not sure how feasible it would be to compare nixpkgs and pkgsrc given how different they ar

NetBSD's pkgsrc has always done extremely well for me for that. I'm not sure how feasible it would be to compare nixpkgs and pkgsrc given how different they are, but I'd encourage people who need that to poke around at both and see which one feels like a better fit for their use case.