http://leksah.org/ It's for haskell programming language
Leksah doesn't support ghc-9.0 (base-4.15), so upstream needs to port leksah to modern dependencies. Until then, we cannot package leksah as ghc-9.0 is our only supported version. We used to carry it in the ::haskell overlay many years ago, but it was eventually masked and removed due to being effectively dead. It does appear that there is activity again, but not enough to keep up with ghc-9.0. Sorry I couldn't be of more help! If things change feel free to let us know. I'll try keeping an eye on it nonetheless.
Please advise another IDE to use with Haskell.
(In reply to Einstok Fair from comment #2) > Please advise another IDE to use with Haskell. I use GNU emacs with haskell-mode and I find that to be more than sufficient. There are other options available apparently such as haskell-language-server coupled with an editor like emacs, but I have never had personal experience with that.
I made a write-up on how to get haskell-language-server working with kate: https://github.com/gentoo-haskell/gentoo-haskell/wiki/haskell-language-server-with-kate You will have to enable the official haskell repo/overlay on your system.