these 5 derivations will be built:
  /nix/store/773cf6f3zaxflywqx9fmazqfrnmpzb1z-closure-info.drv
  /nix/store/blbbkgsw2rkqb9s53fp2260n2855cs58-clan-runtime.drv
  /nix/store/niphj3yqs31ibdx14cfjbkps90afw836-clan-cli-source.drv
  /nix/store/imai0qv8p6jzkgzmvagqhi1pcj9kb4g7-clan-cli.drv
  /nix/store/dhipwm7dn31pqhrpwyp72gdl54793s9l-check-vars.drv