these 2 derivations will be built:
  /nix/store/mwq8xbx6mspsjj5ybzlfbcs32hh93myk-nixos-test-driver-user-firewall-nftables.drv
  /nix/store/s62cyrh7rmiv3sb8mw1xyi8cimhiijjn-container-test-run-user-firewall-nftables.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
error: path '/nix/store/lf7ksiby9q6rl3rnycpxgdn799k4cs21-container-test-run-user-firewall-nftables' is not valid
error: Cannot build '/nix/store/s62cyrh7rmiv3sb8mw1xyi8cimhiijjn-container-test-run-user-firewall-nftables.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/lf7ksiby9q6rl3rnycpxgdn799k4cs21-container-test-run-user-firewall-nftables