these 2 derivations will be built:
  /nix/store/brfzlj1ld48wz58ldhlqrxvcbpq6q63b-resulting-skills-tree.drv
  /nix/store/69g6i0ar178navr0xwncywvsf9fv6d56-validate-skills.drv
cannot build on 'ssh-ng://nix-remote-builder@100.122.21.36': error: failed to start SSH connection to '100.122.21.36'
cannot build on 'ssh-ng://nix-remote-builder@100.122.4.173': error: failed to start SSH connection to '100.122.4.173'