Resolving dependencies...
Configuring hopencl-0.2.0...
Building hopencl-0.2.0...
Failed to install hopencl-0.2.0
Build log ( /home/builder/.cabal/logs/hopencl-0.2.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-21059/hopencl-0.2.0'
[1 of 1] Compiling Main             ( /tmp/cabal-tmp-21059/hopencl-0.2.0/dist/setup/setup.hs, /tmp/cabal-tmp-21059/hopencl-0.2.0/dist/setup/Main.o )
Linking /tmp/cabal-tmp-21059/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
.

cabal: Leaving directory '/tmp/cabal-tmp-21059/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