these 2 derivations will be built:
  /nix/store/sadkw4880kjxblvlln7yddr2k10a18xy-ccusage-20.0.20-vendor.drv
  /nix/store/7d5jfw1f78j28715r9ym8fmvhamvka1z-ccusage-20.0.20.drv