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Hix is a toolkit for Haskell development that usesNix to provide a unified,declarative interface for a range of build related tasks:

• Reproducible environments and dependency overrides
• Cabal file generation
• Hackage upload
• Rapid-recompilation testing withghcid
• Haskell Language Server
• CTags generation
• Virtual Machines for testing
• Compatibility checks for multiple GHC versions

To learn more, please visit thedocumentation page.

You can convert an existing project with Cabal files by executing this command in the project root, usingFlakeHub or GitHub:

nix run 'https://flakehub.com/f/tek/hix/~0.8.tar.gz#bootstrap'nix run 'github:tek/hix?ref=0.8.0#bootstrap'

You can create a new project in the current directory:

nix run 'https://flakehub.com/f/tek/hix/~0.8.tar.gz#new' -- --name 'project-name' --author 'Your Name'

The manual process consists of first adding Hix to your Haskell project flake by specifying the input:

{inputs.hix.url="https://flakehub.com/f/tek/hix/~0.8.tar.gz";}

Then configure your project with NixOS module options:

{description="Example";inputs.hix.url="https://flakehub.com/f/tek/hix/~0.8.tar.gz";outputs={hix, ...}:hix{packages.parser={src=./.;library={enable=true;dependencies=["aeson ^>= 2.0""bytestring"];};executable.enable=true;test.enable=true;};};}

Now generate Cabal files with:

nix run .#gen-cabal

Build the package withnix build, or run the tests intest/Main.hs in GHCid:

nix run .#ghcid -- -p parser