Resolving dependencies...
[1 of 1] Compiling Main             ( /tmp/cabal-tmp-14874/hopencl-0.2.0/dist/setup/setup.hs, /tmp/cabal-tmp-14874/hopencl-0.2.0/dist/setup/Main.o )

/tmp/cabal-tmp-14874/hopencl-0.2.0/dist/setup/setup.hs:4:1: Warning:
    Module ‘System.Cmd’ is deprecated: Use "System.Process" instead
Linking /tmp/cabal-tmp-14874/hopencl-0.2.0/dist/setup/setup ...
Configuring hopencl-0.2.0...
dist/build/Foreign/OpenCL/Bindings/Internal/Types.chs.h:6:19: fatal error: CL/cl.h: No such file or directory
 #include <CL/cl.h>
                   ^
compilation terminated.
c2hs: Error during preprocessing custom header file
Building hopencl-0.2.0...
Preprocessing library hopencl-0.2.0...
c2hs: Foreign/OpenCL/Bindings/Internal/Types.chi not found in:
dist/build
.

Failed to install hopencl-0.2.0
cabal: Error: some packages failed to install:
hopencl-0.2.0 failed during the building phase. The exception was:
ExitFailure 1