Hi Sean,

I suspected sandboxing was involved!
Thanks for the pointer :)

Alfredo

On Tuesday, 14 October 2014, Sean Leather <sean.leather@gmail.com> wrote:
> Hi Alfredo,
>>
>> I will let this gist talk for me:
>>
>> https://gist.github.com/adinapoli/d4c33a9d1ea85bcaebdf
>>
>> 1) Shed some light on my specific use case: Can I do better here? (aka have GHC figure out automatically all the nitty gritty details)
>
> You're installing into a cabal sandbox and compiling directly with ghc (not cabal), but ghc doesn't know anything about the sandbox. You need to point it to the package database with -package-db and tell it the package for linking with -package [2].
> $ ghc -package-db .cabal-sandbox/x86_64-osx-ghc-7.8.3-packages.conf.d -package snappy HelloSnappy.hs
> Linking HelloSnappy ...
> $ ./HelloSnappy
> HelloSnappy: foo.jpg: openBinaryFile: does not exist (No such file or directory)
> [1] http://www.haskell.org/ghc/docs/latest/html/users_guide/packages.html#package-databases
> [2] http://www.haskell.org/ghc/docs/latest/html/users_guide/options-phases.html#options-linker
> Regards,
> Sean