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

Richard Guay raguay at customct.com
Mon Oct 12 07:51:55 UTC 2015

Not sure why, but some programs can not create links or files in
/usr/local. I have ran into this with Hammerspoon and the Haskell
installer. I agree the Haskell for Mac OS X is a better way to run,
but I keep having cabal conflicts with other libraries. I was
answering for the specific problem, not an alternate solution.

On Mon, Oct 12, 2015 at 2:21 PM, Harald Hanche-Olsen
<hanche at math.ntnu.no> wrote:
> 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?
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