Do not attempt to build extensions on platforms other than CPython.
Do not attempt to build extensions on platforms other than CPython.

yaml/pyyaml,anishathalye/pyyaml,fuchsia-mirror/third_party-pyyaml,fuchsia-mirror/third_party-pyyaml,yaml/pyyaml,yaml/pyyaml,jamesbroadhead/pyyaml,jamesbroadhead/pyyaml,anishathalye/pyyaml