I'm not quite sure if the contributing guide mentions it, but if you start development against your own fork, you may end up with mysterious errors:

$  coder git:(main) ✗ make
fatal: No names found, cannot describe anything.
fatal: No names found, cannot describe anything.
make: *** [Makefile:177: build/coder-slim__linux_amd64] Error 128

The clue to solving these issues is to add the upstream: git remote add upstream https://github.com/coder/coder and fetch all tags: git fetch upstream. After that, make succeeded.

If you don't think that this is a gap in CONTRIBUTING guide, maybe we should improve the Makefile to have an actionable error.