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... Installed ansi-terminal-0.6.2.3 Configuring readline-1.0.3.0... Building readline-1.0.3.0... Configuring text-1.2.2.1... Installed mtl-2.2.1 Building text-1.2.2.1... Configuring transformers-compat-0.5.1.4... Installed readline-1.0.3.0 Building transformers-compat-0.5.1.4... Configuring ansi-wl-pprint-0.6.7.3... Installed transformers-compat-0.5.1.4 Building ansi-wl-pprint-0.6.7.3... Installed ansi-wl-pprint-0.6.7.3 Configuring Shellac-0.9.9... Building Shellac-0.9.9... Configuring optparse-applicative-0.13.0.0... Installed Shellac-0.9.9 Building optparse-applicative-0.13.0.0... Installed text-1.2.2.1 Configuring parsec-3.1.11... Building parsec-3.1.11... Configuring Shellac-readline-0.9.9... Installed optparse-applicative-0.13.0.0 Building Shellac-readline-0.9.9... Installed Shellac-readline-0.9.9 Installed parsec-3.1.11 Configuring lambda-calculator-1.1.0... Building lambda-calculator-1.1.0... Failed to install lambda-calculator-1.1.0 Build log ( /home/builder/.cabal/logs/lambda-calculator-1.1.0.log ): cabal: Entering directory '/tmp/cabal-tmp-13860/lambda-calculator-1.1.0' Configuring lambda-calculator-1.1.0... Building lambda-calculator-1.1.0... Preprocessing library lambda-calculator-1.1.0... [1 of 8] Compiling Language.Lambda.Util.PrettyPrint ( src/Language/Lambda/Util/PrettyPrint.hs, dist/build/Language/Lambda/Util/PrettyPrint.o ) [2 of 8] Compiling Language.SystemF.Expression ( src/Language/SystemF/Expression.hs, dist/build/Language/SystemF/Expression.o ) [3 of 8] Compiling Language.SystemF.Parser ( src/Language/SystemF/Parser.hs, dist/build/Language/SystemF/Parser.o ) [4 of 8] Compiling Language.SystemF ( src/Language/SystemF.hs, dist/build/Language/SystemF.o ) [5 of 8] Compiling Language.Lambda.Expression ( src/Language/Lambda/Expression.hs, dist/build/Language/Lambda/Expression.o ) [6 of 8] Compiling Language.Lambda.Parser ( src/Language/Lambda/Parser.hs, dist/build/Language/Lambda/Parser.o ) [7 of 8] Compiling Language.Lambda.Eval ( src/Language/Lambda/Eval.hs, dist/build/Language/Lambda/Eval.o ) [8 of 8] Compiling Language.Lambda ( src/Language/Lambda.hs, dist/build/Language/Lambda.o ) Preprocessing executable 'lambda-calculator' for lambda-calculator-1.1.0... [1 of 2] Compiling Paths_lambda_calculator ( dist/build/autogen/Paths_lambda_calculator.hs, dist/build/lambda-calculator/lambda-calculator-tmp/Paths_lambda_calculator.o ) [2 of 2] Compiling Main ( app/Main.hs, dist/build/lambda-calculator/lambda-calculator-tmp/Main.o ) app/Main.hs:19:32: error: • Variable not in scope: (<>) :: InfoMod a1 -> InfoMod a0 -> InfoMod CliOptions • Perhaps you meant one of these: ‘<*>’ (imported from Options.Applicative), ‘*>’ (imported from Options.Applicative), ‘>>’ (imported from Prelude) app/Main.hs:62:45: error: • Variable not in scope: (<>) :: Mod f3 a5 -> Mod f2 a4 -> t1 • Perhaps you meant one of these: ‘<*>’ (imported from Options.Applicative), ‘*>’ (imported from Options.Applicative), ‘>>’ (imported from Prelude) app/Main.hs:63:39: error: • Variable not in scope: (<>) :: t1 -> Mod f1 a3 -> t0 • Perhaps you meant one of these: ‘<*>’ (imported from Options.Applicative), ‘*>’ (imported from Options.Applicative), ‘>>’ (imported from Prelude) app/Main.hs:64:38: error: • Variable not in scope: (<>) :: t0 -> Mod f0 a2 -> Mod FlagFields (Eval Language) • Perhaps you meant one of these: ‘<*>’ (imported from Options.Applicative), ‘*>’ (imported from Options.Applicative), ‘>>’ (imported from Prelude) app/Main.hs:67:30: error: • Variable not in scope: (<>) :: Mod f6 a8 -> Mod f5 a7 -> t2 • Perhaps you meant one of these: ‘<*>’ (imported from Options.Applicative), ‘*>’ (imported from Options.Applicative), ‘>>’ (imported from Prelude) app/Main.hs:68:25: error: • Variable not in scope: (<>) :: t2 -> Mod f4 a6 -> Mod FlagFields Bool • Perhaps you meant one of these: ‘<*>’ (imported from Options.Applicative), ‘*>’ (imported from Options.Applicative), ‘>>’ (imported from Prelude) cabal: Leaving directory '/tmp/cabal-tmp-13860/lambda-calculator-1.1.0' cabal: Error: some packages failed to install: lambda-calculator-1.1.0 failed during the building phase. The exception was: ExitFailure 1