Resolving dependencies... Configuring mtl-2.2.1... Configuring primitive-0.6.1.0... Building mtl-2.2.1... Building primitive-0.6.1.0... Installed mtl-2.2.1 Configuring random-1.1... Building random-1.1... Configuring split-0.2.3.1... Installed primitive-0.6.1.0 Building split-0.2.3.1... Configuring storable-complex-0.2.2... Installed split-0.2.3.1 Building storable-complex-0.2.2... Installed random-1.1 Configuring vector-0.11.0.0... Installed storable-complex-0.2.2 Building vector-0.11.0.0... Installed vector-0.11.0.0 Configuring hmatrix-0.18.0.0... Building hmatrix-0.18.0.0... Installed hmatrix-0.18.0.0 Configuring hmatrix-gsl-stats-0.4.1.6... Building hmatrix-gsl-stats-0.4.1.6... Installed hmatrix-gsl-stats-0.4.1.6 Configuring hstatistics-0.2.5.4... Building hstatistics-0.2.5.4... Installed hstatistics-0.2.5.4 Configuring hsignal-0.2.2... Failed to install hsignal-0.2.2 Build log ( /home/builder/.cabal/logs/hsignal-0.2.2.log ): cabal: Entering directory '/tmp/cabal-tmp-21193/hsignal-0.2.2' [1 of 1] Compiling Main ( /tmp/cabal-tmp-21193/hsignal-0.2.2/dist/setup/setup.hs, /tmp/cabal-tmp-21193/hsignal-0.2.2/dist/setup/Main.o ) Linking /tmp/cabal-tmp-21193/hsignal-0.2.2/dist/setup/setup ... Configuring hsignal-0.2.2... configure.hs:20:1: error: Failed to load interface for ‘System’ Use -v to see a list of the files searched for. cabal: Leaving directory '/tmp/cabal-tmp-21193/hsignal-0.2.2' cabal: Error: some packages failed to install: hsignal-0.2.2 failed during the configure step. The exception was: ExitFailure 1