these 3 derivations will be built:
  /nix/store/3i0kxsxsh4qqipzgzygzbd1gg3ws6w08-dsh-source.drv
  /nix/store/vsqz1xi42icgbssj6x3sr2ad5idrzxnp-dsh-0.2.1-rc.3.drv
  /nix/store/zdva1k7hh79ijfzpbmrsj16jif0zw07q-check-dsh.drv