singletons-{th,base}: Require building with GHC 9.12
#370
| Job | Run time |
|---|---|
| 2m 25s | |
| 2m 31s | |
| 2m 27s | |
| 2m 18s | |
| 2m 6s | |
| 1m 56s | |
| 1m 49s | |
| 1m 52s | |
| 1m 44s | |
| 1m 47s | |
| 1m 46s | |
| 1m 52s | |
| 2m 0s | |
| 26m 33s |