nixos-option 8 NixOS nixos-option inspect a NixOS configuration nixos-option option.name This command evaluates the configuration specified in /etc/nixos/configuration.nix and returns the properties of the option name given as argument. When the option name is not an option, the command prints the list of attributes contained in the attribute set. NIXOS_CONFIG Path to the main NixOS configuration module. Defaults to /etc/nixos/configuration.nix. Investigate option values: $ nixos-option boot.loader This attribute set contains: generationsDir grub initScript $ nixos-option boot.loader.grub.enable Value: true Default: true Description: Whether to enable the GNU GRUB boot loader. Declared by: "/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/system/boot/loader/grub/grub.nix" Defined by: "/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/system/boot/loader/grub/grub.nix" The author listed in the following section is wrong. If there is any other bug, please report to Nicolas Pierron.