these 3 derivations will be built:
  /nix/store/9jp16wmhyvbcncqx2gf5d12zlvbb5b6r-web-health.service.drv
  /nix/store/1lqhmrz56vj3qfl4sn91ycvxmswb7mxm-flakelet-lib-test-units.drv
  /nix/store/kp52g5d3fzb2nvvk1zx6gb4yf5g1ahpx-flakelet-lib-test.drv