these 3 derivations will be built:
  /nix/store/hyi0l1svlj2zmhxzqsq87lmmyp0c6yrv-skills-src-with-lock.drv
  /nix/store/yak4wh5dmssi8n360ym89app8a7mjkqz-skills-1.7.1.drv
  /nix/store/h8zmsqkjzrjbrhl6anh34g75s4jckjb6-check-skills.drv