Resolving dependencies...
cabal: Could not resolve dependencies:
trying: hist-pl-0.3.2 (user goal)
trying: transformers-0.5.2.0/installed-0.5... (dependency of dawg-0.11)
trying: mtl-2.2.1 (dependency of dawg-0.11)
next goal: pipes (dependency of hist-pl-0.3.2)
rejecting: pipes-4.3.1, pipes-4.3.0, pipes-4.2.0, pipes-4.1.9, pipes-4.1.8,
pipes-4.1.7, pipes-4.1.6, pipes-4.1.5, pipes-4.1.4, pipes-4.1.3, pipes-4.1.2,
pipes-4.1.1, pipes-4.1.0 (conflict: hist-pl => pipes>=4.0 && <4.1)
rejecting: pipes-4.0.2, pipes-4.0.1 (conflict:
transformers==0.5.2.0/installed-0.5..., pipes => transformers>=0.2.0.0 &&
<0.4)
rejecting: pipes-4.0.0 (conflict: mtl==2.2.1, pipes => mtl>=2.0.1.0 && <2.2)
rejecting: pipes-3.3.0, pipes-3.2.0, pipes-3.1.0, pipes-3.0.0, pipes-2.5.0,
pipes-2.4.0, pipes-2.3.0, pipes-2.2.0, pipes-2.1.0, pipes-2.0.0, pipes-1.0.2,
pipes-1.0.1, pipes-1.0 (conflict: hist-pl => pipes>=4.0 && <4.1)
Dependency tree exhaustively searched.