Resolving dependencies... Configuring al-0.1.4.2... Building al-0.1.4.2... Failed to install al-0.1.4.2 Build log ( /home/builder/.cabal/logs/ghc-8.2.2/al-0.1.4.2-Fs5j5fdcAF661NVidCEVZt.log ): cabal: Entering directory '/tmp/cabal-tmp-16044/al-0.1.4.2' Configuring al-0.1.4.2... Preprocessing library for al-0.1.4.2.. dist/build/Sound/AL/Buffer.chs.h:2:16: fatal error: al.h: No such file or directory #include ^ compilation terminated. c2hs: Error during preprocessing custom header file cabal: Leaving directory '/tmp/cabal-tmp-16044/al-0.1.4.2' cabal: Error: some packages failed to install: al-0.1.4.2-Fs5j5fdcAF661NVidCEVZt failed during the building phase. The exception was: ExitFailure 1