By: Michael Lynch <git@mtlynch.io>
Provide coreutils to Dockerfile CI runner NixCI runs the docker-image wrapper with only declared runtime inputs on PATH. Add coreutils so dev-scripts/test-dockerfile can use mktemp and other basic file utilities when the impure test starts.
| Time to Start | Worker time | Duration | Time to finish | Idle | |
| Config | 1s | 5s | 5s | 7s | 1s |
| Eval | 5s | 38s | 36m12s | 36m18s | 0s |
| Build | 10s | 4m20s | 36m07s | 36m18s | 0s |
| Test | 24s | 14s | 16s | 40s | 0s |
| Suite | 1s | 5m19s | 36m16s | 36m18s | 35m30s |