Reftest: add build-env overwrite predefined build env opam vars
#3250
| Job | Run time |
|---|---|
| 5s | |
| 5s | |
| 27m 16s | |
| 2m 40s | |
| 2m 23s | |
| 22s | |
| 2m 35s | |
| 2m 21s | |
| 2m 20s | |
| 2m 27s | |
| 3m 29s | |
| 2m 19s | |
| 2m 9s | |
| 2m 16s | |
| 39m 42s | |
| 47m 4s | |
| 47m 37s | |
| 50m 7s | |
| 50m 49s | |
| 1m 54s | |
| 1m 26s | |
| 1m 26s | |
| 5m 8s | |
| 16m 10s | |
| 59s | |
| 1m 15s | |
| 1m 41s | |
| 5h 18m 5s |