This depends on how you installed Haskell.
The recommended way to install Haskell on a Mac according to TidalCycles documentation is to install
ghcup using this command:
curl https://get-ghcup.haskell.org -sSf | sh
If you install Haskell this way the install script will ask you to add a line to your
~/.bash_profile that should take care of adding everything you need to your
If you installed Haskell in a different way you can update the question to reflect that and I will update my answer.
If you want to fix things manually you can try if running this makes
If that's the case you can make
ghci available permanently by adding
to the appropriate dotfile (
This blog post provides a more detailed tutorial on how to install Haskell and on how to make sure that all the executables are in your