Resolving dependencies...
Downloading hopencl-0.2.0...
[1 of 1] Compiling Main             ( /tmp/hopencl-0.2.0-31235/hopencl-0.2.0/Setup.hs, /tmp/hopencl-0.2.0-31235/hopencl-0.2.0/dist/setup/Main.o )
Linking /tmp/hopencl-0.2.0-31235/hopencl-0.2.0/dist/setup/setup ...
Configuring hopencl-0.2.0...
setup: The program c2hs is required but it could not be found.
Failed to install hopencl-0.2.0
cabal: Error: some packages failed to install:
hopencl-0.2.0 failed during the configure step. The exception was:
ExitFailure 1