these 3 derivations will be built:
  /nix/store/zwd4br5kcpll96w1kqiig8lzbsr29sp5-tgrab-0.1.0-vendor-staging.drv
  /nix/store/h6k7kyrnrcbngyhm5s98bgvfls3k57sh-tgrab-0.1.0-vendor.drv
  /nix/store/27f7521yig26nxbs8ldk0bdgyffa6d31-tgrab-0.1.0.drv