cabal-install from devel:languages:haskell:Leap project
Select Your Operating System
Add repository and install manually
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:haskell:Leap/15.6/devel:languages:haskell:Leap.repo zypper refresh zypper install cabal-install