1# Testing the Installer {#ch-testing-installer} 2 3Building, burning, and booting from an installation CD is rather 4tedious, so here is a quick way to see if the installer works properly: 5 6```ShellSession 7# mount -t tmpfs none /mnt 8# nixos-generate-config --root /mnt 9$ nix-build '<nixpkgs/nixos>' -A config.system.build.nixos-install 10# ./result/bin/nixos-install 11``` 12 13To start a login shell in the new NixOS installation in `/mnt`: 14 15```ShellSession 16$ nix-build '<nixpkgs/nixos>' -A config.system.build.nixos-enter 17# ./result/bin/nixos-enter 18```