these 3 derivations will be built:
  /nix/store/0kb5f2p0l8xnda2lqj6s7v52v6q9g8w0-clan-cli-source.drv
  /nix/store/m5ai786ci8p0iyqly11hcaihl93jqnam-clan-cli.drv
  /nix/store/gk8kfd5l1c3ffb1m5dnippxs3a4v31h6-nix-shell.drv