these 5 derivations will be built:
  /nix/store/qa8wlqyi7lvkxis915svsqk0n38znrgj-dsh-0.2.2-rc.2.tgz.drv
  /nix/store/x4yx65xq5k4gqqp1mi62y44z2szs1r97-dsh-source.drv
  /nix/store/9ag00rdydphn722bnazn861rin3jzlgn-dsh-0.2.2-rc.2-npm-deps.drv
  /nix/store/mlx0hy51b6n6a2mw2gzfp9azc0gcbwp0-dsh-0.2.2-rc.2.drv
  /nix/store/a1cp555ryyf6qc0f14caxf387ja9dfid-check-dsh.drv