Sorry, it seems that this is a known problem with Mac OS 10.11. From https://github.com/phonohawk/HsOpenSSL/issues/41

openssl libs and includes are not included in OS X 10.11. I'm not sure if this is permanent or just an effect of the beta release but we should keep our eye on it so when 10.11 is released, HsOpenSSL will work smoothly.


On Mon, Nov 16, 2015 at 9:14 AM, George Colpitts <george.colpitts@gmail.com> wrote:

find /usr/local -iname asn1.h
/usr/local/Cellar/nettle/2.7.1/include/nettle/asn1.h
/usr/local/Cellar/openssl/1.0.1j/include/openssl/asn1.h
/usr/local/Cellar/openssl/1.0.1j_1/include/openssl/asn1.h
/usr/local/Cellar/openssl/1.0.1l/include/openssl/asn1.h
/usr/local/Cellar/openssl/1.0.2a-1/include/openssl/asn1.h
/usr/local/Cellar/openssl/1.0.2c/include/openssl/asn1.h
/usr/local/Cellar/openssl/1.0.2d_1/include/openssl/asn1.h

​As you might guess​ from the above I've successfully installed this in the past with other versions of ghc :)

Thanks for all your help here

Cheers
George


On Mon, Nov 16, 2015 at 8:52 AM, Ben Gamari <ben@smart-cactus.org> wrote:
George Colpitts <george.colpitts@gmail.com> writes:

> As I mentioned above from brew:
>
> $ brew upgrade openssl
> brew upgrade openssl
> Error: openssl 1.0.2d_1 already installed
>
I see. Does the file in question exist?

What does

    find /usr/local -iname asn1.h

say?

Cheers,

- Ben