ruby-mini-portile2 binary package in Ubuntu Oracular s390x

 It provides a standard and simplified way to compile against dependency
 libraries without messing up one's system. It is not a general package
 management system. It is not aimed to replace apt, macports or homebrew.
 .
 It's intended primarily to make sure that a developer of a library, can
 reproduce a user's dependencies and environment by specifying a specific
 version of an underlying dependency that one would like to use.

Source package