The latest version (4.4.4) prevents the go agent to be built on 32-bits platforms:

pkg/std/os_mock.go:105:19: cannot use o.ftimes[name].acTime (type int64) as type int32 in assignment
pkg/std/os_mock.go:106:19: cannot use o.ftimes[name].chTime (type int64) as type int32 in assignment

This is on Alpine Linux. Version 4.4.3 had no issues.