I have a package set that I work on here: https://github.com/cprussin/nixjs. I’ve been interested in getting the packages to be cached in a binary cache somewhere to speed up build times for folks who consume the package set (it takes around an hour on a fairly beefy machine to compile either of nodejs or purescript). I posted a thread about this a while back and someone recommended the cachenix project, which is interesting but doesn’t quite solve my needs (I haven’t found a good way to trigger the builds from CI since they take too long for travis, and in any case the cache becomes stale when the upstream nixpkgs get updated). I think that building the package set in Hydra alongside nixpkgs would be ideal, but I don’t know if this is possible for a custom (non-nixpkgs) project. Is this possible? Does anyone have any pointers here to help me get started?