these 5 derivations will be built:
  /nix/store/fkjgjyl11lgg5gh5l0r72n0miqc1n6gh-source.drv
  /nix/store/gimblg02xrbmd76zzqdh603pfixifx64-source.drv
  /nix/store/25i1zrykipsqvbc937b152hfaix516s4-beads-rust-0.5.2-vendor-staging.drv
  /nix/store/fpg319abs20m952z4h59bsc6c2zqj9mv-beads-rust-0.5.2-vendor.drv
  /nix/store/k4by8hpfzzrzchvbadfjp5svvjc0pa3h-beads-rust-0.5.2.drv