What is Gentoo?
Gentoo is a totally free Linux distribution. It uses the latest development tools and software technologies and is dedicated to quality rather than blindly following traditional usage patterns with binary packages and config files. Every part of Gentoo, including installation images, is free software; most of the source code is available to whoever wants it. Gentoo has been developed in an entirely open process, in which technical choices are made via discussion in email forums and IRC channels rather than by secretive members of some elite development cabal. Each package in Gentoo has its own maintainer who decides whether or not to include it; you are welcome to volunteer to Gentoo.
What is Nexus?
The Nexus repository is a repository that facilitates the discovery, access and installation of public artifacts. It supports open source dependencies and references them in Maven-compatible package declarations. The most common use is to resolve a target dependency by hashing a file with a specified MD5 sum and using Nexus to look up the artifact in its local cache or available repositories . It is also possible to combine Maven (and other) metadata with an artifact before publication.
Nexus alternatives for Gentoo
If you’re looking for Nexus alternatives for Gentoo, you could look into packagecloud as a method to handle all of your package management. This means that you won’t need a handful of package managers for Nexus or distributors for Gentoo to get the packages you need. Packagecloud can manage all of your packages in one place so you always know they’re secure and accessible.