[Haskell-beginners] Can't install Haskell platform on Mac OS X El Capitan

[Harald Hanche-Olsen]

Richard Guay wrote:
> The installer can't create the links to your /usr/local/bin folder
> anymore under El Capitan.

How come? The /usr/local hierarchy is expressly excempt from the 
restrictions that apply to the rest of the /usr hierarchy.

I have all kinds of stuff in /usr/local myself, no trouble at all.

But Haskell platform used to install binaries in /usr/bin, which is 
definitely a no-no on El Capitan. I think a workaround was posted to 
this mailing list, or was it on cafe?

Personally, I have abandoned Haskell platform in favour of the 
installation instructions here:

https://github.com/bitemyapp/learnhaskell/blob/master/install.md

So I couldn't comment on the viability of the workaround that I saw.

– Harald

PS. I don't know what happens if /usr/local did not exist when you 
installed El Capitan. Is it then necessary to turn off SIP in order to 
create this directory, due to the restrictions on /usr?