Cabal Download - Gtools

Compile and run:

cabal list --installed cabal list gtools # searches Hackage If nothing appears, the package may be from a different ecosystem or a private repository. Cause: Your GHC version is too old or too new for the gtools version you’re trying to install. Fix: Use cabal install gtools --allow-older or switch GHC versions via ghcup . Error 3: "Cabal: Failed to build gtools: Missing foreign library" Some gtools versions depend on C libraries (e.g., gsl , blas ). Install them system-wide: gtools cabal download

cabal v2-install --lib git+https://github.com/username/gtools.git Once cabal install gtools --lib succeeds, you can use it in a .hs file: Compile and run: cabal list --installed cabal list

git clone https://github.com/username/gtools.git cd gtools cabal build cabal install --lib Or, in one line: in one line: