MessagePack serialization Formula was removed
Last versions were
php53-msgpack requires the following formula to be installed:
autoconf 2.69 Automatic configure script builder

Recent formula history

Mike McQuaid Deprecate tap.
Andy Blyler Update URLs to use HTTPS
Andy Blyler msgpack: fix brew audit issues + add bottles
吕海涛 msgpack: update to 0.5.7
Jack Nagel Move abstract classes out of Formula directory

Formula code at GitHub