Resolving dependencies... Downloading EEConfig-1.0... Configuring EEConfig-1.0... Building EEConfig-1.0... Preprocessing library EEConfig-1.0... [1 of 1] Compiling EEConfig ( EEConfig.hs, dist/build/EEConfig.o ) In-place registering EEConfig-1.0... Running Haddock for EEConfig-1.0... Running hscolour for EEConfig-1.0... Preprocessing library EEConfig-1.0... HsColour: EEConfig.hs: hGetContents: invalid argument (invalid byte sequence) Installing library in /srv/hackage/var/build/tmp-install/lib/EEConfig-1.0/ghc-7.6.3 Registering EEConfig-1.0... Installed EEConfig-1.0 Configuring OpenGLRaw-1.4.0.0... cabal: Missing dependency on a foreign library: * Missing C library: GL 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 OpenGLRaw-1.4.0.0 cabal: Error: some packages failed to install: GLURaw-1.4.0.0 depends on OpenGLRaw-1.4.0.0 which failed to install. GLUT-2.5.0.2 depends on OpenGLRaw-1.4.0.0 which failed to install. OpenGL-2.9.1.0 depends on OpenGLRaw-1.4.0.0 which failed to install. OpenGLRaw-1.4.0.0 failed during the configure step. The exception was: ExitFailure 1 hpylos-1.0 depends on OpenGLRaw-1.4.0.0 which failed to install.