Brew error: Could not symlink, path is not writable

Question

When I try to install a library with homebrew (brew install aLibrary), I got the following error:

Could not symlink lib/pkgconfig/a         


        

Answer 1

Use the following.

$ brew doctor

message will display error links to prune. If any found, run next option.

$ brew prune

once these are removed, proceed to link them agian

$ brew link python