these 2 derivations will be built:
  /nix/store/srijpyjz0zzq0k0vrnnz26g1217skydi-ccusage-20.0.21-vendor.drv
  /nix/store/k8cjydmm81r8bw846361hh672c7zyh4s-ccusage-20.0.21.drv