these 4 derivations will be built:
  /nix/store/kcf9r1f8kdr6684pmym7nj6glvydiyzc-clan-cli-source.drv
  /nix/store/03klfhlmp79887xn23caqsw34q35ms92-clan-cli.drv
  /nix/store/sdvkzmq2i1y7lfwdadja8dh282cn6bak-closure-info.drv
  /nix/store/8mwxywmf4vcyxn3b3m79k39imp4zs7m1-check-vars.drv