this derivation will be built:
  /nix/store/bqc2ypxxw1hp3y57byzp78yfnzqa9m1h-fail-4.drv
building '/nix/store/bqc2ypxxw1hp3y57byzp78yfnzqa9m1h-fail-4.drv' on 'ssh-ng://nix@jamie'
building '/nix/store/bqc2ypxxw1hp3y57byzp78yfnzqa9m1h-fail-4.drv'
fail-4> this build is supposed to fail
error: build of '/nix/store/bqc2ypxxw1hp3y57byzp78yfnzqa9m1h-fail-4.drv' on 'ssh-ng://nix@jamie' failed: Cannot build '/nix/store/bqc2ypxxw1hp3y57byzp78yfnzqa9m1h-fail-4.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/yvpxfp05ll5zdwqzd82m9d9c5fcmfkcb-fail-4
       Last 1 log lines:
       > this build is supposed to fail
       For full logs, run:
         nix log /nix/store/bqc2ypxxw1hp3y57byzp78yfnzqa9m1h-fail-4.drv
error: Cannot build '/nix/store/bqc2ypxxw1hp3y57byzp78yfnzqa9m1h-fail-4.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/yvpxfp05ll5zdwqzd82m9d9c5fcmfkcb-fail-4