See: * https://nix-community.github.io/home-manager/tools.html - `--flake` option docs * https://github.com/nix-community/home-manager/commit/3a16ebdf726a7ba5abb073bb069fbe8344826e88 * https://github.com/nix-community/home-manager/commit/e7eba9cc46547ae86642ad3c6a9a4fb22c07bc26
