The parser seems to be broken. Attempting to build basement yields:

Basement/Nat.hs:15:46: error: parse error on input ‘*’ | 15 | , type (<=), type (<=?), type (+), type (*), type (^), type (-) | ^

The GHC development team is pleased to announce the first 
alpha release leading up to GHC 8.6.1. The usual release artifacts
are available from

    https://downloads.haskell.org/~ghc/8.6.1-alpha1

This is the first release (partially) generated using our new CI
infrastructure. One known issue is that the haddock documentation is
currently unavailable. This will be fixed in the next alpha release. Do
let us know if you spot anything else amiss.

As always, do let us know if you encounter any trouble in the course of
testing. Thanks for your help!

Cheers,

- Ben

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