these 2 derivations will be built:
  /nix/store/8415hcp6pl7pym1g9j9z0qhy9x685116-resulting-skills-tree.drv
  /nix/store/1shfhj5rlvn6fwkr89v9yc4cnfjw1m11-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'