Hi John,
I'm pretty confident my build system patch https://issues.guix.gnu.org/49199 works well as far as I've tested it. However, for things like GHC, that would require a lot of compile time and package updates everywhere I think, and I personally don't have the resources/time to do that.
I could branch wip-haskell off of core-updates and apply that patch, then add a build farm job for wip-haskell.
Would that help? -- Ricardo
