brown121407@posteo.ro writes:

> From: Alexandru-Sergiu Marton <brown121407@member.fsf.org>
>
> * gnu/packages/haskell-xyz.scm (ghc-extra): Downgrade to 1.6.21.

Thanks!  Pushed in 0cec5c4eb1b4ac9a3fbe3f11cffff92e01ff4c58.