looks like this:
```sudo nixos-rebuild switch --flake . --verbose
[sudo] password for onajimaru:
warning: Git tree '/home/onajimaru/repos/nixcfg' is dirty
building the system configuration...
warning: Git tree '/home/onajimaru/repos/nixcfg' is dirty
[0/13 built] waiting for lock on '/nix/store/p83r3y08fi0sknxn9bahnnm63rxgrmw0-firefox-unwrapped-79.0'```