What is Nix package manager?
Nix package manager solves the problem of inconsistent, incomplete package state by enforcing complete state by default. Nix provides atomic upgrades and rollbacks, side-by-side installation of multiple versions of a package, multi-user support, per-user profiles, and improved conflicts resolution. It also has powerful user environment management which makes it easy to work with multiple profiles.
What is CentOS?
CentOS Linux is a free and open source operating system that is functionally compatible with its upstream source, Red Hat Enterprise Linux (RHEL). CentOS conforms fully with the upstream vendor's redistribution policy and aims to be 100% binary compatible. It aims to provide enterprise-class capabilities on community-supported infrastructure.
Package Management for CentOS packages on Nix package manager with packagecloud
If you’re looking to manage CentOS packages on Nix package manager, you can use packagecloud to handle all of your package management. Packagecloud works with all kinds of packages, not only CentOS packages. With packagecloud you can manage all of your packages from various OS’s, languages, and more. Always trust that your packages will be secure when you publish your CentOS packages on Nix package manager via packagecloud.
Nix package manager also integrates with

Archlinux

CentOS

Debian

Fedora

Gentoo

Java

Javascript

Kubuntu

Lubuntu

Manjaro

OpenSUSE

Python

Red Hat

Red Hat Enterprise Linux

Ruby

Slackware

SuSe

Ubuntu

Xubuntu

Archlinux

Debian

Fedora

Gentoo

Java

Javascript

Kubuntu

Lubuntu

Manjaro

OpenSUSE

Python

Red Hat Enterprise Linux

Red Hat

Ruby

Slackware

SuSe

Ubuntu

Xubuntu