Resolving dependencies... Downloading lbfgs-0.0.1... Configuring lbfgs-0.0.1... Building lbfgs-0.0.1... Preprocessing library lbfgs-0.0.1... Raw.hsc:3:19: fatal error: lbfgs.h: No such file or directory compilation terminated. compiling dist/build/Numeric/LBFGS/Raw_hsc_make.c failed (exit code 1) command was: /usr/bin/gcc -c dist/build/Numeric/LBFGS/Raw_hsc_make.c -o dist/build/Numeric/LBFGS/Raw_hsc_make.o -fno-stack-protector -Wl,--hash-size=31 -Wl,--reduce-memory-overheads -D__GLASGOW_HASKELL__=706 -Dlinux_BUILD_OS=1 -Dx86_64_BUILD_ARCH=1 -Dlinux_HOST_OS=1 -Dx86_64_HOST_ARCH=1 -Icbits -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -I/usr/local/lib/ghc-7.6.3/base-4.6.0.1/include -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -I/usr/local/lib/ghc-7.6.3/include -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -I/usr/local/lib/ghc-7.6.3/include/ Failed to install lbfgs-0.0.1 cabal: Error: some packages failed to install: lbfgs-0.0.1 failed during the building phase. The exception was: ExitFailure 1