these 3 derivations will be built:
  /nix/store/d57iimxqfipq7c90dxrckrhv8jw2ylvj-dsh-source.drv
  /nix/store/mfd3qk8cvg1vs6xyx6gfrsh1d7ir37rj-dsh-0.2.0-rc.2.drv
  /nix/store/zp40ndh66frafhk8shddrjcpgximcxpf-check-dsh.drv