Resolving dependencies... Configuring ansi-terminal-0.6.2.3... Configuring mtl-2.2.1... Building mtl-2.2.1... Building ansi-terminal-0.6.2.3... Installed ansi-terminal-0.6.2.3 Configuring primitive-0.6.1.0... Building primitive-0.6.1.0... Configuring transformers-compat-0.5.1.4... Installed mtl-2.2.1 Building transformers-compat-0.5.1.4... Configuring text-1.2.2.1... Installed transformers-compat-0.5.1.4 Building text-1.2.2.1... Configuring ansi-wl-pprint-0.6.7.3... Installed primitive-0.6.1.0 Building ansi-wl-pprint-0.6.7.3... Installed ansi-wl-pprint-0.6.7.3 Configuring vector-0.11.0.0... Building vector-0.11.0.0... Configuring optparse-applicative-0.13.0.0... Installed text-1.2.2.1 Building optparse-applicative-0.13.0.0... Installed optparse-applicative-0.13.0.0 Configuring hashable-1.2.4.0... Building hashable-1.2.4.0... Configuring parsec-3.1.11... Installed hashable-1.2.4.0 Building parsec-3.1.11... Configuring unordered-containers-0.2.7.1... Installed vector-0.11.0.0 Building unordered-containers-0.2.7.1... Configuring scientific-0.3.4.9... Installed parsec-3.1.11 Building scientific-0.3.4.9... Configuring network-uri-2.6.1.0... Installed scientific-0.3.4.9 Installed unordered-containers-0.2.7.1 Configuring attoparsec-0.13.1.0... Building network-uri-2.6.1.0... Building attoparsec-0.13.1.0... Installed network-uri-2.6.1.0 Installed attoparsec-0.13.1.0 Configuring ini-0.3.5... Building ini-0.3.5... Installed ini-0.3.5 Configuring opn-0.1.2... Building opn-0.1.2... Failed to install opn-0.1.2 Build log ( /home/builder/.cabal/logs/opn-0.1.2.log ): cabal: Entering directory '/tmp/cabal-tmp-27638/opn-0.1.2' [1 of 1] Compiling Main ( /tmp/cabal-tmp-27638/opn-0.1.2/dist/setup/setup.hs, /tmp/cabal-tmp-27638/opn-0.1.2/dist/setup/Main.o ) Linking /tmp/cabal-tmp-27638/opn-0.1.2/dist/setup/setup ... Configuring opn-0.1.2... Building opn-0.1.2... Preprocessing executable 'opn' for opn-0.1.2... [1 of 2] Compiling Opn.Guess ( Opn/Guess.hs, dist/build/opn/opn-tmp/Opn/Guess.o ) [2 of 2] Compiling Main ( opn.hs, dist/build/opn/opn-tmp/Main.o ) opn.hs:42:32: error: • Variable not in scope: (<>) :: Mod f3 a4 -> Mod f2 a3 -> Mod FlagFields Bool • Perhaps you meant one of these: ‘’ (imported from System.FilePath), ‘<$>’ (imported from Options.Applicative), ‘*>’ (imported from Options.Applicative) opn.hs:46:52: error: • Variable not in scope: (<>) :: Parser (a2 -> a2) -> Mod f1 a1 -> t0 • Perhaps you meant one of these: ‘’ (imported from System.FilePath), ‘<$>’ (imported from Options.Applicative), ‘*>’ (imported from Options.Applicative) opn.hs:46:65: error: • Variable not in scope: (<>) :: t0 -> Mod f0 a0 -> t • Perhaps you meant one of these: ‘’ (imported from System.FilePath), ‘<$>’ (imported from Options.Applicative), ‘*>’ (imported from Options.Applicative) cabal: Leaving directory '/tmp/cabal-tmp-27638/opn-0.1.2' cabal: Error: some packages failed to install: opn-0.1.2 failed during the building phase. The exception was: ExitFailure 1