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