Resolving dependencies... Downloading OpenCL-1.0.3.3... Configuring OpenCL-1.0.3.3... Warning: Instead of 'cpp-options: -Iinclude' use 'include-dirs: include' cabal: Missing dependency on a foreign library: * Missing C library: OpenCL This problem can usually be solved by installing the system package that provides this library (you may need the "-dev" version). If the library is already installed but in a non-standard location then you can use the flags --extra-include-dirs= and --extra-lib-dirs= to specify where it is. Failed to install OpenCL-1.0.3.3 cabal: Error: some packages failed to install: OpenCL-1.0.3.3 failed during the configure step. The exception was: ExitFailure 1