these 4 derivations will be built:
  /nix/store/w8cb43fbzzf4wws0dwi43izi4fkc817l-dsh-0.1.5-rc.2.tgz.drv
  /nix/store/6vkka06s8pnr4qwl095pvi418073hb8f-dsh-source.drv
  /nix/store/6i1lqhxwqsivpmchwi7lx8n0dpp4170d-dsh-0.1.5-rc.2-npm-deps.drv
  /nix/store/wdkf11my55j4gxwp5n0dvd4js4ixpbf0-dsh-0.1.5-rc.2.drv