Some core packages are failing

[UnkindPartition]

At the moment some core packages are failing, including:

• stm (blocking 84)
• primitive (blocking 60)
• memory (blocking 10)

They may be masking some other failures.

We need to investigate why they are failing, whether they are fixed in a newer snapshot or in their git repos. Then make them succeed by either updating the snapshot or using a custom source url.

[UnkindPartition]

Another option to look into is head.hackage: https://github.com/hvr/head.hackage

It's a repo maintained by the ghc devs containing patches to make the packages build with ghc head.

So if we apply these patches to stackage packages before building, we could get much fewer failures. OTOH this will make stackage-head more useful as a CI but less useful as a metric of how ready the community is for the new ghc release.