Haskell's stack tool is aiming for something like this. All you need is the stack binary. stack will download GHC for you at a given version, and fetch your dependencies for you. The dependencies are locked to a fixed snapshot of versions. There are curated snaphots, with an LTS model that guarantees all packages in the snapshot work together, so you're insulated from package authors randomly breaking API compatibility on you, and you can upgrade to newer LTS snaphots when you're good and ready.