[Haskell-beginners] ghc-8.4.3 at Ubuntu

[Andreas Röhler]

While installing ghc-8.4.3-i386-deb8-linux.tar.xz at Debian8 went 
smoothly, can't se how to install ghc-8.4.3 at Ubuntu resp. Xubuntu:


in dir ghc-8.4.3/

./configure
checking for gfind... no
checking for find... /usr/bin/find
checking for sort... /usr/bin/sort
checking for GHC Git commit id... given 
51abb1c88b53e2989a2a8c2939ac4abc04bef194
checking for ghc... /usr/bin/ghc
checking version of ghc... 7.10.3
configure: error: GHC version 8.0 or later is required to compile GHC.

Did cabal update

and tried haskell-platform for ubuntu
https://www.haskell.org/platform/linux.html#linux-ubuntu

which seems broken

Tried Haskell-platform from source:

./platform.sh
***
*** Building hptool
***
cabal: unrecognised command: new-build (try --help)


Any help?

Cheers,
Andreas