these 4 derivations will be built:
  /nix/store/zmxnxxm1ypaxp8x22zsp6a9m5w9xi93l-clan-cli-source.drv
  /nix/store/1yycpxdgcldcmxl1y1wb238yi40hvhxv-clan-cli.drv
  /nix/store/n14qbh27rwmmwxs9afq9a5qmp9srl9gi-closure-info.drv
  /nix/store/k1lic628i0d86hhn36sd5rzi6mi16d71-check-vars.drv