these 5 derivations will be built:
  /nix/store/78wx72d191dw4sbw3f321vm74pm4faam-source.drv
  /nix/store/mv8jmgd84ma161sllk2gphmlw9jpv08j-source.drv
  /nix/store/nd0n1b5g3xpxr50idsq52adbgdw6pajk-beads-rust-0.4.1-vendor-staging.drv
  /nix/store/iw5ikmbv6myslnzs21197nsdkrqkyb8q-beads-rust-0.4.1-vendor.drv
  /nix/store/nhpkhk6vimvkkpcv33vjyb7invp10668-beads-rust-0.4.1.drv