The Docker build fails when installing the PHP Redis extension via PECL because it cannot find php_msgpack.h, even when explicitly trying to disable msgpack support.

error details 
checking for msgpack includes... configure: error: Cannot find php_msgpack.h
ERROR: `/tmp/pear/temp/redis/configure --with-php-config=/usr/local/bin/php-config --enable-redis-igbinary=y --enable-redis-lzf=y --enable-redis-zstd=y --enable-redis-msgpack=y --enable-redis-lz4=y --with-liblz4=y' failed