nixpkgs/nixos/doc/manual/development/testing-installer.chapter.md

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# Testing the Installer {#ch-testing-installer}
Building, burning, and booting from an installation CD is rather
tedious, so here is a quick way to see if the installer works properly:
```ShellSession
# mount -t tmpfs none /mnt
# nixos-generate-config --root /mnt
$ nix-build '<nixpkgs/nixos>' -A config.system.build.nixos-install
# ./result/bin/nixos-install
```
To start a login shell in the new NixOS installation in `/mnt`:
```ShellSession
$ nix-build '<nixpkgs/nixos>' -A config.system.build.nixos-enter
# ./result/bin/nixos-enter
```