these 3 derivations will be built:
  /nix/store/m23bjgvaadbmdpa4m2l5rsv74rsw4a8j-dsh-source.drv
  /nix/store/agbj859wr2gywvlav6rxn6wrhy5j3szm-dsh-0.2.2-rc.1.drv
  /nix/store/7p59malpvlfdf4ki82mw706b4j0rbbf6-check-dsh.drv