Restore from-source serde_derive build on all platforms — eventually we'd like to use a first-class precompiled macro if such a thing becomes supported by cargo / crates.io
This is the outcome we were all hoping for.
No hard fork splitting the community, just the maintainer listening to feedback from their users.
I mean, this change was done to stir the pot, let's not act like this was a mistake. Not reverting would have been terrible, but that doesn't mean that reverting was anything more than the expected thing to do