Current release on Hackage has base < 4.10 in its dependencies. This disallows installing it with Cabal on a system with GHC later than 8.0. I checked out the repo, and it seems to build with --allow-newer just fine except for a couple of warnings about redundant Data.Monoid import and showVersion being subsumed by prettyShow. Maybe it's not that hard to fix and release?
I see #32 but I don't quite get what's the problem discussed there.