Does not build with ghc 9

See comment below

original post

I'd very much like to try this out, but couldn't get it to build (this is probably just my inexperience with building GHC). Both BuildFlavour = quick and the default flavor result in scope errors such as:

compiler/stage1/build/GHC/Cmm/Parser.hs:482:24: error:
    Not in scope: ‘Prelude.*’
    No module named ‘Prelude’ is imported.
    |
482 |         bit_start = st Prelude.* 134
    | 

Which makes sense, because it seems the files are being compiled with -XNoImplicitPrelude and it's not being imported. Any suggestions?