these 5 derivations will be built:
  /nix/store/znslv3xgirk4ydbsjpimsd2f2fahlkkg-dsh-0.2.1-rc.2.tgz.drv
  /nix/store/gc34354l0gjawxs7d83x6v7b82g43s2a-dsh-source.drv
  /nix/store/sb9g4wvlx7xaydx7kqw64s675wppr6k4-dsh-0.2.1-rc.2-npm-deps.drv
  /nix/store/jdn5kqlvxg1hd8gyjxxs1y6x4ja8p6i0-dsh-0.2.1-rc.2.drv
  /nix/store/7kyvaxqg03k7slpkyrn54wpsjlnnpd8m-check-dsh.drv