Resolving dependencies... Configuring ansi-terminal-0.6.2.3... Configuring mtl-2.2.1... Building ansi-terminal-0.6.2.3... Building mtl-2.2.1... Configuring stm-2.4.4.1... Installed ansi-terminal-0.6.2.3 Building stm-2.4.4.1... Configuring transformers-compat-0.5.1.4... Installed mtl-2.2.1 Building transformers-compat-0.5.1.4... Configuring ansi-wl-pprint-0.6.7.3... Installed stm-2.4.4.1 Installed transformers-compat-0.5.1.4 Configuring exceptions-0.8.3... Building ansi-wl-pprint-0.6.7.3... Building exceptions-0.8.3... Installed ansi-wl-pprint-0.6.7.3 Configuring optparse-applicative-0.13.0.0... Building optparse-applicative-0.13.0.0... Installed exceptions-0.8.3 Configuring temporary-1.2.0.4... Building temporary-1.2.0.4... Installed temporary-1.2.0.4 Installed optparse-applicative-0.13.0.0 Downloading cabalg-0.1.2... Configuring cabalg-0.1.2... Building cabalg-0.1.2... Failed to install cabalg-0.1.2 Build log ( /home/builder/.cabal/logs/cabalg-0.1.2.log ): cabal: Entering directory '/tmp/cabal-tmp-30158/cabalg-0.1.2' Configuring cabalg-0.1.2... Building cabalg-0.1.2... Preprocessing executable 'cabalg' for cabalg-0.1.2... [1 of 3] Compiling Sandbox ( src/Sandbox.hs, dist/build/cabalg/cabalg-tmp/Sandbox.o ) [2 of 3] Compiling Git ( src/Git.hs, dist/build/cabalg/cabalg-tmp/Git.o ) [3 of 3] Compiling Main ( src/Main.hs, dist/build/cabalg/cabalg-tmp/Main.o ) src/Main.hs:13:56: error: • Variable not in scope: (<>) :: ParserInfo Configuration -> InfoMod a0 -> t • Perhaps you meant one of these: ‘<$>’ (imported from Options.Applicative), ‘*>’ (imported from Options.Applicative), ‘<$’ (imported from Options.Applicative) src/Main.hs:36:42: error: • Variable not in scope: (<>) :: Mod f1 a2 -> Mod f0 a1 -> Mod OptionFields String • Perhaps you meant one of these: ‘<$>’ (imported from Options.Applicative), ‘*>’ (imported from Options.Applicative), ‘<$’ (imported from Options.Applicative) cabal: Leaving directory '/tmp/cabal-tmp-30158/cabalg-0.1.2' cabal: Error: some packages failed to install: cabalg-0.1.2 failed during the building phase. The exception was: ExitFailure 1