Resolving dependencies...
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Installed mtl-2.2.1
Downloading pasty-0.1...
Configuring pasty-0.1...
Building pasty-0.1...
Failed to install pasty-0.1
Build log ( /home/builder/.cabal/logs/pasty-0.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-20960/pasty-0.1'
Configuring pasty-0.1...
Building pasty-0.1...
Preprocessing executable 'pasty' for pasty-0.1...
[1 of 7] Compiling PastyData        ( src/PastyData.hs, dist/build/pasty/pasty-tmp/PastyData.o )
[2 of 7] Compiling IO               ( src/IO.hs, dist/build/pasty/pasty-tmp/IO.o )

src/IO.hs:57:14: error:
    Variable not in scope:
      try :: IO B.ByteString -> IO (Either IOError B.ByteString)
cabal: Leaving directory '/tmp/cabal-tmp-20960/pasty-0.1'
cabal: Error: some packages failed to install:
pasty-0.1 failed during the building phase. The exception was:
ExitFailure 1