Keybord is not working

After install nixos my laptop keyboard is not working

Yeah, I can imagine why you’re not giving more info to help debug, given the problem…

Can you ssh in from another computer? Does the install disk still work? Can you chroot in and get some logs? What laptop are you using?

You can check the nixos-hardware repo to see if there’s a module for your laptop.

Just connect USB keyboard till you fix the problem.