Making changes to Hix

When making changes to the way Hix works it is often useful to be able to test the changes locally before uploading them to github.

Hix Command Wrappers

Install the hix command wrappers after making changes to a local clone of haskell.nix:

nix-env -iA hix -f /path/to/local/haskell.nix

Or override the version of haskell.nix used by the commands with the HIX_ROOT environment variable:

HIX_ROOT=/path/to/local/haskell.nix hix-shell


For flakes use --override-input to point to the modified haskell.nix:

nix develop --override-input haskellNix /path/to/local/haskell.nix