these 2 derivations will be built:
  /nix/store/29laj46v2ipxa1l2qgj5kvwd19r2kpl2-cc-sdd-3.1.0.drv
  /nix/store/kdcwz2dfh7l21yx2kdc72bwgy7jnv8kz-check-cc-sdd.drv