these 3 derivations will be built:
  /nix/store/c94sx84p4p4w8k2rrd7ryb35shzq1ipd-skills-src-with-lock.drv
  /nix/store/c37c48k4rz8xxyv19l8pic1mybiq0f30-skills-1.7.0.drv
  /nix/store/2scg6qjaajj5adl1yb7pbvgq5b63zziy-check-skills.drv