```
/tmp/nix-build-compiler-rt-libc-12.0.0.drv-0/compiler-rt-12.0.0.src/lib/sanitizer_common/sanitizer_mac.cpp:617:7: error: use of undeclared
identifier 'TARGET_OS_IOS'
if (TARGET_OS_IOS || TARGET_OS_TV) return 6;
^
/tmp/nix-build-compiler-rt-libc-12.0.0.drv-0/compiler-rt-12.0.0.src/lib/sanitizer_common/sanitizer_mac.cpp:617:24: error: use of undeclared
identifier 'TARGET_OS_TV'
if (TARGET_OS_IOS || TARGET_OS_TV) return 6;
^
/tmp/nix-build-compiler-rt-libc-12.0.0.drv-0/compiler-rt-12.0.0.src/lib/sanitizer_common/sanitizer_mac.cpp:618:7: error: use of undeclared
identifier 'TARGET_OS_WATCH'
if (TARGET_OS_WATCH) return 13;
^
/tmp/nix-build-compiler-rt-libc-12.0.0.drv-0/compiler-rt-12.0.0.src/lib/sanitizer_common/sanitizer_mac.cpp:687:7: error: use of undeclared
identifier 'TARGET_OS_IOS'
if (TARGET_OS_IOS || TARGET_OS_TV)
^
/tmp/nix-build-compiler-rt-libc-12.0.0.drv-0/compiler-rt-12.0.0.src/lib/sanitizer_common/sanitizer_mac.cpp:687:24: error: use of undeclared
identifier 'TARGET_OS_TV'
if (TARGET_OS_IOS || TARGET_OS_TV)
^
/tmp/nix-build-compiler-rt-libc-12.0.0.drv-0/compiler-rt-12.0.0.src/lib/sanitizer_common/sanitizer_mac.cpp:689:12: error: use of undeclared
identifier 'TARGET_OS_WATCH'
else if (TARGET_OS_WATCH)
^
6 errors generated.
```
For now you had to know that the actions are retried for 900s when
seeing an error like
> Traceback (most recent call last):
> File "/nix/store/dbvmxk60sv87xsxm7kwzzjm7a4fhgy6y-nixos-test-driver/bin/.nixos-test-driver-wrapped", line 927, in run_tests
> exec(tests, globals())
> File "<string>", line 1, in <module>
> File "<string>", line 31, in <module>
> File "/nix/store/dbvmxk60sv87xsxm7kwzzjm7a4fhgy6y-nixos-test-driver/bin/.nixos-test-driver-wrapped", line 565, in wait_for_file
> retry(check_file)
> File "/nix/store/dbvmxk60sv87xsxm7kwzzjm7a4fhgy6y-nixos-test-driver/bin/.nixos-test-driver-wrapped", line 142, in retry
> raise Exception("action timed out")
> Exception: action timed out
in your (hydra) build failure. Due to the absence of timestamps you were
left guessing if the machine was just slow, someone passed a low timeout
value (which they couldn't until now) or whatever might have happened.
By making this error a bit more descriptive (by including the elapsed
time) these hopefully become more useful.
Dmitry Kalinkin