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 Xubuntu?
Xubuntu is a community developed distribution for desktops and laptops based on the lightweight Xfce desktop environment. Xubuntu is an elegant and easy to use operating system. At its core, it's solid and minimalist. In addition, Xubuntu is fully customizable with hundreds of themes to choose from, along with different modifications for the Openbox window manager.
Publish Xubuntu packages on Nix package manager with packagecloud
If you’re looking to publish Xubuntu 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 Xubuntu 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 Xubuntu 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

Archlinux

CentOS

Debian

Fedora

Gentoo

Java

Javascript

Kubuntu

Lubuntu

Manjaro

OpenSUSE

Python

Red Hat Enterprise Linux

Red Hat

Ruby

Slackware

SuSe

Ubuntu

Xubuntu