https://www.haskell.org/ghcup/
https://gitlab.haskell.org/haskell/ghcup-hs

https://www.haskell.org/ghcup/install/
pre-requisites
curl g++ gcc gmp make ncurses realpath xz-utils
    Error: gmp not found
    Error: ncurses not found
    Error: realpath has no installation candidate.

https://www.haskell.org/ghcup/guide/
https://www.haskell.org/ghcup/dev/

https://github.com/hasufell/ghcup.vim