these 4 derivations will be built:
  /nix/store/aqb9p2kwh0qazklhmn7g2299bspjmlsc-clan-cli-source.drv
  /nix/store/7cplwb3vvrmiw7nm3rkalmsi5wlw6mlf-clan-cli.drv
  /nix/store/vknnxryjsy4gg57rw2hkgjiy62qzihjh-closure-info.drv
  /nix/store/72y9gwjw1pm260h71src6qln7yb2lkvj-check-vars.drv