Resolving dependencies...
Configuring libpq-0.2...
Building libpq-0.2...
Failed to install libpq-0.2
Build log ( /home/builder/.cabal/logs/libpq-0.2.log ):
cabal: Entering directory '/tmp/cabal-tmp-10019/libpq-0.2'
Configuring libpq-0.2...
Building libpq-0.2...
Preprocessing library libpq-0.2...
PQ.hsc:140:22: fatal error: libpq-fe.h: No such file or directory
compilation terminated.
compiling dist/build/Database/PQ_hsc_make.c failed (exit code 1)
command was: /usr/bin/gcc -c dist/build/Database/PQ_hsc_make.c -o dist/build/Database/PQ_hsc_make.o -fno-stack-protector -fno-stack-protector -D__GLASGOW_HASKELL__=800 -Dlinux_BUILD_OS=1 -Dx86_64_BUILD_ARCH=1 -Dlinux_HOST_OS=1 -Dx86_64_HOST_ARCH=1 -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -I/opt/ghc/8.0.2/lib/ghc-8.0.1.20161018/unix-2.7.2.0/include -I/opt/ghc/8.0.2/lib/ghc-8.0.1.20161018/time-1.6.0.1/include -I/opt/ghc/8.0.2/lib/ghc-8.0.1.20161018/bytestring-0.10.8.1/include -I/opt/ghc/8.0.2/lib/ghc-8.0.1.20161018/base-4.9.0.0/include -I/opt/ghc/8.0.2/lib/ghc-8.0.1.20161018/integer-gmp-1.0.0.1/include -I/opt/ghc/8.0.2/lib/ghc-8.0.1.20161018/include -I/opt/ghc/8.0.2/lib/ghc-8.0.1.20161018/include/
cabal: Leaving directory '/tmp/cabal-tmp-10019/libpq-0.2'
cabal: Error: some packages failed to install:
libpq-0.2 failed during the building phase. The exception was:
ExitFailure 1