Hi,
I've been using Hakyll form the Git master without any problems
on Arch Linux 64-bit until last update of the Arch, cabal update
and after pulling the recent Hakyll source.
The cabal installed cryptohash-0.8.3, but Hakyll seems to require
0.7 version, nothing earlier, nothing later:
$ cabal configure
Resolving dependencies...
Configuring hakyll-3.5.2.0...
cabal: At least the following dependencies are missing:
cryptohash ==0.7.*