these 3 derivations will be built:
  /nix/store/pziarrbhicnwqj0rr2snyfm5fr2gzamx-source.drv
  /nix/store/i942g7758hq7569wv37c5iz1pwjw4664-bernstein-3.23.0.drv
  /nix/store/b0k4ggg2429nzzhsg0w7ldm3nx4cin9j-check-bernstein.drv