Much better than a .dotfiles repo
"$(nix-build home-manager-entry.nix --no-out-link)/activate"
sudo nix-env \
--profile /nix/var/nix/profiles/system \
--set "$(nix-build nixos-entry.nix -A system --no-out-link)"
sudo /nix/var/nix/profiles/system/bin/switch-to-configuration switch
Also
nixos-option \
--options_expr '(import ./nixos-entry.nix).options' \
--config_expr '(import ./nixos-entry.nix).config'