cffi: fix build
#2391
| Job | Run time |
|---|---|
| 21s | |
| 30s | |
| 20m 15s | |
| 36m 58s | |
| 1h 17m 27s | |
| 40m 59s | |
| 42m 46s | |
| 22m 2s | |
| 9m 53s | |
| 14m 45s | |
| 2m 51s | |
| 14m 56s | |
| 13m 36s | |
| 3m 23s | |
| 2m 58s | |
| 3m 12s | |
| 13m 42s | |
| 1m 58s | |
| 2m 51s | |
| 2m 36s | |
| 2m 49s | |
| 3m 7s | |
| 2m 53s | |
| 1m 54s | |
| 2m 48s | |
| 3m 7s | |
| 11m 47s | |
| 3m 6s | |
| 21m 41s | |
| 10m 12s | |
| 27m 58s | |
| 10m 22s | |
| 2m 2s | |
| 2m 26s | |
| 13m 22s | |
| 20m 20s | |
| 13m 34s | |
| 22m 32s | |
| 11m 10s | |
| 13s | |
| 8h 35m 22s |