k3s now has proper nftables support: https://github.com/k3s-io/k3s/issues/1812  k3s tests pass:    ```bash  $ nix-build --no-out-link .  -A nixosTests.k3s  /nix/store/jdnl8rqh08chrhnnr3gggbbdwaysknkg-vm-test-run-k3s  ```