these 3 derivations will be built:
  /nix/store/bdi7frb2snpswxz0yfkwvcwsnv11szs3-source.drv
  /nix/store/116jva5zriz45dgpjhxbjz3vdf68pvb5-collie-1.25.6.drv
  /nix/store/qww2zfvcq5bbr9iji4w9iwplmqzg8y0k-check-collie.drv