Nix is a purely functional package manager that exozyme users can use to install packages.
Configuration
Run
nix-channel --add https://nixos.org/channels/nixpkgs-unstable
nix-channel --update
to configure a channel (repository).
Now add the ~/.nix-profile/bin directory to your $PATH. For Fish, you can do this with fish_add_path ~/.nix-profile/bin.
Usage
You can install packages with nix-env --install. nix-env --query lists all directly installed packages and nix-env --uninstall will remove a package.
Check out this guide for setting up a development environment.
Tips and tricks
Graphical acceleration
To run OpenGL and Vulkan applications, install NixGL.
Desktop integration
For integrating Nix applications with your desktop environment, add the ~/.nix-profile/share directory to your $XDG_DATA_DIRS. For instance, with Fish this would look like adding export XDG_DATA_DIRS="$HOME/.nix-profile/share:$XDG_DATA_DIRS" to your ~/.config/fish/config.fish.
Locale warnings
Export the environmental variable LC_ALL=C to fix locale warnings.