Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: OpenCL (user goal)
rejecting: OpenCL-1.0.3.4, 1.0.3.3, 1.0.3.2, 1.0.3.1, 1.0.3.0, 1.0.2.6,
1.0.2.4, 1.0.2.3, 1.0.2.2 (global constraint requires ==1.0.1.3)
trying: OpenCL-1.0.1.3
trying: base-4.8.1.0/installed-4f7... (dependency of OpenCL-1.0.1.3)
next goal: mtl (dependency of OpenCL-1.0.1.3)
rejecting: mtl-2.2.1, 2.2.0.1, 2.2, 2.1.3.1, 2.1.2, 2.1.1, 2.1 (conflict:
OpenCL => mtl==2.0.*)
trying: mtl-2.0.1.1
next goal: transformers (dependency of mtl-2.0.1.1)
rejecting: transformers-0.4.2.0/installed-21d..., 0.4.3.0, 0.4.2.0, 0.4.1.0,
0.3.0.0 (conflict: mtl => transformers==0.2.*)
trying: transformers-0.2.2.1
rejecting: transformers-0.2.2.1:+applicativeinbase (conflict:
base==4.8.1.0/installed-4f7..., transformers-0.2.2.1:applicativeinbase =>
base>=2 && <4.8)
rejecting: transformers-0.2.2.1:-applicativeinbase (conflict:
base==4.8.1.0/installed-4f7..., transformers-0.2.2.1:applicativeinbase =>
base>=1.0 && <2)
Dependency tree exhaustively searched.