Andrés Sicard-Ramírez writes:

On 19 April 2018 at 19:01, Ben Gamari wrote:

...

The GHC team is pleased to announce the availability of GHC 8.4.2.

Please note that the tar files for the binary distributions for Linux (x86_64) Debian 9 and Debian 8 are the same (i.e. ghc-8.4.2-x86_64-deb8-linux.tar.xz) on the following link

https://www.haskell.org/ghc/download_ghc_8_4_2.html#linux_x86_64

The same happens on GHC 8.4.3.

Fixed. Thanks for letting me know. Cheers, - Ben