文章目錄

1. 1. What happened ?
2. 2. A simple solution

What happened ?

I just upgraded to El Capitan, and I installed the package with the package manager from the official website. After that I typed in ghci in terminal, but it turned out: command not found. I checked the documentation which states: Executables are symlinked in /usr/local/bin and should be available in any shell. It seems that the problem is caused by /usr/local/bin which is missing from the beginning.

A simple solution

Use /Library/Haskell/bin/uninstall-hs to remove the installed packagescd /usr/localmkdir bininstall the packages again
cd /usr/local
mkdir bin
install the packages again