i'm using home manager on a non nixos distro (gentoo), and I like it because I can declarative configure my programs, eg firefox nushell etc etc. but, each time I have to unlink some programs in `~/.nix-profile/bin/` because they get picked up instead of the one that are native to my system (managed via package manager). i've been `unlink` manually, but is there a way to tell home manager "just configure this, don't install the binary"?