Gtools Cabal Download -

This is a version conflict. Use a fresh cabal project with a cabal.project file:

packages: .
constraints: gtools >=0.1

Then run cabal build inside that project.

The typical cabal workflow involves updating your package list, then downloading and building gtools. gtools cabal download

This is what most people actually want:

cabal install statistics --lib

The --lib flag tells Cabal to install the library globally so you can use it in your Haskell code. This is a version conflict

To actually install the library so you can use it in your projects:

cabal install gtools --lib

The --lib flag ensures the library is registered globally for GHC. Then run cabal build inside that project

For a specific version:

cabal install gtools-0.1.0.0

Given a cabal.project.freeze or a set of constraints:

gtools cabal download warp \
  --constraint="warp ==3.3.13" \
  --constraint="http-types <0.13" \
  -o ./pinned-warp

This resolves the exact revision from Hackage that satisfies the constraints—useful for debugging “could not resolve dependencies” errors.