these 5 derivations will be built:
  /nix/store/8cqdg55a4gdj4kacglpzwb8bf939badi-clan-runtime.drv
  /nix/store/flr2wrdsms4vlhvvyyq6qaqanvm1cpmf-closure-info.drv
  /nix/store/xdcc33qr47pb29s9wg00iimm8y86bbaq-clan-cli-source.drv
  /nix/store/ip09bliyjz7m2hfvxw5lm2srg4s259f9-clan-cli.drv
  /nix/store/fbbar9zk8r6bhg4kyp4gybr4cvd094ks-check-vars.drv