Filed a bug under GHC Trac, #9620 On Sat, Sep 20, 2014 at 7:24 AM, Herbert Valerio Riedel wrote:

Hello!

Is there a ticket for that already on GHC Trac? If not, please create one, and try to document everything we already know about this issue

On 2014-09-20 at 14:25:56 +0200, member MP2E wrote:

...

Symlinking lib64 to lib didn't seem to work, I think the directory is getting cleared before build. But if I copy the contents of lib64 to lib after the build fails and then type make again, ghc compiles!

Thanks for the workaround, hopefully a real fix will be found soon enough :)

On Sat, Sep 20, 2014 at 4:18 AM, Moritz Angermann

wrote:

...

While this is not a proper fix. Assuming there is no no lib folder, and the proper lib is in lib64, does: symlinking lib64 to lib and continuing with make solve the issue?

On Sep 20, 2014, at 12:32 PM, member MP2E wrote:

...

Yep, I reported this same build error for NixOS on x86_64, unfortunately I haven't found any way to solve it. Reverting the commit that upgrades to libffi-3.1 still showed this issue. I'd love to see this fixed, as I am unable to do any development on GHC until it's fixed :(