<chapter xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude" version="5.0" xml:id="ch-testing-installer"> <title>Testing the Installer</title> <para> Building, burning, and booting from an installation CD is rather tedious, so here is a quick way to see if the installer works properly: <screen> <prompt># </prompt>mount -t tmpfs none /mnt <prompt># </prompt>nixos-generate-config --root /mnt <prompt>$ </prompt>nix-build '<nixpkgs/nixos>' -A config.system.build.nixos-install <prompt># </prompt>./result/bin/nixos-install</screen> To start a login shell in the new NixOS installation in <filename>/mnt</filename>: <screen> <prompt>$ </prompt>nix-build '<nixpkgs/nixos>' -A config.system.build.nixos-enter <prompt># </prompt>./result/bin/nixos-enter </screen> </para> </chapter>