Resolving dependencies... Configuring mtl-2.2.1... Configuring text-1.2.2.1... Building mtl-2.2.1... Building text-1.2.2.1... Installed mtl-2.2.1 Configuring regex-base-0.93.2... Building regex-base-0.93.2... Installed regex-base-0.93.2 Installed text-1.2.2.1 Configuring parsec-3.1.11... Building parsec-3.1.11... Installed parsec-3.1.11 Configuring regex-parsec-0.90... Building regex-parsec-0.90... Failed to install regex-parsec-0.90 Build log ( /home/builder/.cabal/logs/regex-parsec-0.90.log ): cabal: Entering directory '/tmp/cabal-tmp-32054/regex-parsec-0.90' [1 of 1] Compiling Main ( /tmp/cabal-tmp-32054/regex-parsec-0.90/dist/setup/setup.hs, /tmp/cabal-tmp-32054/regex-parsec-0.90/dist/setup/Main.o ) Linking /tmp/cabal-tmp-32054/regex-parsec-0.90/dist/setup/setup ... Configuring regex-parsec-0.90... Warning: No 'build-type' specified. If you do not need a custom Setup.hs or ./configure script then use 'build-type: Simple'. Building regex-parsec-0.90... Preprocessing library regex-parsec-0.90... Text/Regex/Parsec/Wrap.hs:1:16: warning: -fglasgow-exts is deprecated: Use individual extensions instead : error: Failing due to -Werror. cabal: Leaving directory '/tmp/cabal-tmp-32054/regex-parsec-0.90' cabal: Error: some packages failed to install: regex-parsec-0.90 failed during the building phase. The exception was: ExitFailure 1