Error starting domain: Cannot recv data: Connection reset by peer - Virt manager, qemu, nixos

[ghost]

hello i followed this tutorial https://www.youtube.com/watch?v=eTWf5D092VY

it worked up to 19:18. when i start the VM my screen freezes
everything up to that point worked perfectly, including the ssh start.sh and revert.sh
maybe the hooks aren't being activated right?

Error starting domain: Cannot recv data: Connection reset by peer