uwebsockets needs to be updated to the latest release. The build is failing:

external/uwebsockets/src/App.h:90:62: error: static assertion failed: Mismatching uSockets/uWebSockets ABI
   90 |     static_assert(sizeof(struct us_socket_context_options_t) == sizeof(SocketContextOptions), "Mismatching uSockets/uWebSockets ABI");

It looks like the latest µWebSockets may depend on an unreleased µSockets? (The latest µSockets release is Sept 2021. There should perhaps also be a note that these packages should update in tandem in the relevant repository.bzl(s)?)

Note also that new_release.py is not currently working on usockets due to sigmavirus24/github3.py#1105.