Hello from NixOS:) (https://github.com/seagreen/vivaine https://github.com/seagreen/vivaine) I don't think nixpkgs is a direct solution to this problem though.

Hello from NixOS:) (https://github.com/seagreen/vivaine https://github.com/seagreen/vivaine) I don't think nixpkgs is a direct solution to this problem though. (A) Sometimes you're stuck with cabal-install because the rest of the people in the project use it. Nixpkgs includes many different sets of haskell packages, but isn't designed to pull in arbitrary versions of lots of different haskell packages by default. (B) Even if the rest of the team was using a set of haskell packages compatible with one of the Nixpkgs sets, it still involves extra work to figure out what C libraries the computer you're deploying to has, and then to make sure they're packaged for Nixpkgs and build with them. I think Nixpkgs and NixOS are _fantastic_ tools, but they aren't a panacea for all haskell deployment solutions.