[Gtk2hs-users] gtkglext install problem.

[David D. <duk...@gm...>]

Hello I'm trying to install  the current version (0.13.2.0) but have run
into difficulties. My platform is
OSX
ghc-8.6.3 installed via  Haskell Platform
Cabal 2.4.0.1
cabal-install  version 2.4.1.0


Trying cabal install gtkglext  results  in a failure with a message

setup: failed to parse output of 'ghc-pkg dump'
Searching for the error online leads to an issue:
https://github.com/haskell/cabal/issues/5548
It suggests
You should use cabal-install-2.2 ( I assumed that t be "at least 2.2; I
have 2.4)

I'd move to ghc-8.6.5 but  https://www.haskell.org/platform/ doesn't yet
seem to have a download link for OSX.
I can only see 1successful build report  - for linux.
So can can  anyone report a successful build on OSX, if so with which ghc
version etc?
Any suggestions on how to make progress would be helpful

thanks in advance,
David