Another rattler author here! Indeed, pubgrub-rs looks like one hell of a good alternative to libsolv. We've already tried quite a bit to use it in rattler, but

Another rattler author here! Indeed, pubgrub-rs looks like one hell of a good alternative to libsolv. We've already tried quite a bit to use it in rattler, but the many "variant" packages in the conda ecosystem gave it a bit of a hard time. We still think that we can make it work. And thanks for linking a PackagingCon talk – I am actually the an organizer of that conference and happy to report that it's coming back this year in October (https://packaging-con.org https://packaging-con.org has the details).