1. Choose single-user installation, run:

   sh <(curl -L https://nixos.org/nix/install) --no-daemon
   . "$HOME"/.nix-profile/etc/profile.d/nix.sh

   For more information, visit nixos.org/download

2. Add the appropriate home manager channel, run:

   nix-channel --add https://github.com/nix-community/home-manager/archive/master.tar.gz home-manager
   nix-channel --add https://github.com/nix-community/nixGL/archive/main.tar.gz nixgl
   nix-channel --update

   In the Nix ecosystem, which includes the Nix home-manager, a channel refers to a method for managing and distributing collections of Nix packages and configurations. Channels are essentially repositories of Nix expressions that define both packages and configurations. These channels are regularly updated, allowing users to subscribe to them to receive the latest updates. The mentioned command adds a channel named "home-manager", indicating that any package installed through this channel will be updated to the latest version available, as per the unstable branch listed on search.nixos.org/packages.

3. Run the home manager installation command and create the first home manager generation:

   nix-shell '<home-manager>' -A install
   echo ". \"\$HOME\"/.nix-profile/etc/profile.d/nix.sh" | tee -a $HOME/.bashrc > /dev/null
   source $HOME/.bashrc

4. Check home.nix configuration, run:

   cat ~/.config/home-manager/home.nix

Visit nix-community.github.io/home-manager/index.xhtml#sec-usage-configuration how to use home-manager command.