## The symptom
On Apple M1 hosts, `pip install confluent-kafka` failed: no arm64 wheels, and
the source build could not find the brew-installed librdkafka headers.
## The durable fix
The maintainers shipped macOS arm64 wheels in v1.9.2 (linux arm64 in v2.1.0).
Just install a recent version in a fresh env:
```
pip install 'confluent-kafka>=1.9.2'
```
Zero build setup needed.
## The old workaround (only if you are pinned)
If you cannot move off an older release, the historical workaround was:
```
brew install librdkafka
export C_INCLUDE_PATH=$(brew --prefix)/include
export LIBRARY_PATH=$(brew --prefix)/lib
pip install confluent-kafka
```
Only fall back to this brew + env-var path if you are pinned to an older
release. The version bump is the real fix.