these 5 derivations will be built:
  /nix/store/4x5zsdphaffw1ixvnlai53z4h9wd9chy-source.drv
  /nix/store/l5629zl18nv2fs96pyqdj2hblyg01r8d-source.drv
  /nix/store/ylixmvcqyjg74yf4js8a1hgxcb7dirzh-beads-rust-0.5.6-vendor-staging.drv
  /nix/store/jddmk6ipnfi1skq82l0y3d547w6hhla6-beads-rust-0.5.6-vendor.drv
  /nix/store/y9my3i49iwwz6iipaffnny43wayanyg8-beads-rust-0.5.6.drv