Resolving dependencies...
Configuring extensible-exceptions-0.1.1.4...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Building extensible-exceptions-0.1.1.4...
Configuring utf8-string-1.0.1.1...
Installed extensible-exceptions-0.1.1.4
Building utf8-string-1.0.1.1...
Installed mtl-2.2.1
Configuring regex-base-0.93.2...
Building regex-base-0.93.2...
Installed utf8-string-1.0.1.1
Installed regex-base-0.93.2
Configuring regex-posix-0.95.2...
Building regex-posix-0.95.2...
Installed regex-posix-0.95.2
Configuring regex-compat-0.95.1...
Building regex-compat-0.95.1...
Installed regex-compat-0.95.1
Downloading lhs2tex-1.15...
Configuring lhs2tex-1.15...
Failed to install lhs2tex-1.15
Build log ( /home/builder/.cabal/logs/lhs2tex-1.15.log ):
cabal: Entering directory '/tmp/cabal-tmp-9420/lhs2tex-1.15'
cabal: Leaving directory '/tmp/cabal-tmp-9420/lhs2tex-1.15'
cabal: Error: some packages failed to install:
lhs2tex-1.15 failed during the configure step. The exception was:
user error ('/opt/ghc/8.0.2/bin/ghc' exited with an error:

/tmp/cabal-tmp-9420/lhs2tex-1.15/dist/setup/setup.hs:27:25: error:
Module ‘System.IO.Error’ does not export ‘try’
)