this derivation will be built:
  /nix/store/s5hrxp61cfgl6idsr7867gspad42p6p2-check-bb-app.drv
this path will be fetched (0.0 KiB download, 155.5 MiB unpacked):
  /nix/store/hgddzi5d4cqdbgi4hqzs9x0jjjw4dppj-bb-app-0.47.1