I just tested haskell-zeromq4-haskell build with a patched GHC and it worked fine, so, I understand also that the problem is fixed.
I just installed the packages also, and they seem to be working properly:
dpkg -l | grep zeromq
ii libghc-zeromq4-haskell-dev 0.6.5-5
ppc64el bindings to ZeroMQ 4.x
ii libghc-zeromq4-haskell-doc 0.6.5-5
all bindings to ZeroMQ 4.x; documentation
ii libghc-zeromq4-haskell-prof 0.6.5-5
ppc64el bindings to ZeroMQ 4.x; profiling libraries
Thanks!

