Resolving dependencies... Configuring base-orphans-0.7... Configuring cabal-doctest-1.0.6... Building base-orphans-0.7... Building cabal-doctest-1.0.6... Installed base-orphans-0.7 Configuring fail-4.9.0.0... Installed cabal-doctest-1.0.6 Configuring prettyprinter-1.2.0.1... Building fail-4.9.0.0... Installed fail-4.9.0.0 Configuring reflection-2.1.3... Building prettyprinter-1.2.0.1... Building reflection-2.1.3... Installed prettyprinter-1.2.0.1 Configuring semigroups-0.18.4... Building semigroups-0.18.4... Installed reflection-2.1.3 Configuring stm-delay-0.1.1.1... Building stm-delay-0.1.1.1... Installed semigroups-0.18.4 Configuring th-abstraction-0.2.6.0... Building th-abstraction-0.2.6.0... Installed stm-delay-0.1.1.1 Configuring transformers-compat-0.6.2... Building transformers-compat-0.6.2... Installed th-abstraction-0.2.6.0 Configuring void-0.7.2... Installed transformers-compat-0.6.2 Configuring transformers-base-0.4.5.2... Building void-0.7.2... Building transformers-base-0.4.5.2... Installed void-0.7.2 Configuring tagged-0.8.5... Building tagged-0.8.5... Installed transformers-base-0.4.5.2 Configuring exceptions-0.10.0... Building exceptions-0.10.0... Installed tagged-0.8.5 Configuring contravariant-1.4.1... Building contravariant-1.4.1... Installed exceptions-0.10.0 Configuring monad-control-1.0.2.3... Building monad-control-1.0.2.3... Installed contravariant-1.4.1 Configuring extensible-effects-2.4.0.0... Installed monad-control-1.0.2.3 Configuring distributive-0.5.3... Building extensible-effects-2.4.0.0... Building distributive-0.5.3... Installed distributive-0.5.3 Configuring comonad-5.0.3... Installed extensible-effects-2.4.0.0 Building comonad-5.0.3... Installed comonad-5.0.3 Configuring bifunctors-5.5.2... Building bifunctors-5.5.2... Installed bifunctors-5.5.2 Configuring profunctors-5.2.2... Configuring semigroupoids-5.2.2... Building profunctors-5.2.2... Building semigroupoids-5.2.2... Installed profunctors-5.2.2 Installed semigroupoids-5.2.2 Configuring free-5.0.2... Building free-5.0.2... Installed free-5.0.2 Configuring logging-effect-1.3.0... Configuring adjunctions-4.4... Building adjunctions-4.4... Building logging-effect-1.3.0... Installed logging-effect-1.3.0 Installed adjunctions-4.4 Configuring kan-extensions-5.1... Building kan-extensions-5.1... Installed kan-extensions-5.1 Configuring lens-4.16.1... Building lens-4.16.1... Installed lens-4.16.1 Configuring extensible-effects-concurrent-0.1.2.1... Building extensible-effects-concurrent-0.1.2.1... Failed to install extensible-effects-concurrent-0.1.2.1 Build log ( /home/builder/.cabal/logs/ghc-8.2.2/extensible-effects-concurrent-0.1.2.1-EoPIcKgvhAuLnFr3dh11NT.log ): cabal: Entering directory '/tmp/cabal-tmp-29238/extensible-effects-concurrent-0.1.2.1' Configuring extensible-effects-concurrent-0.1.2.1... Preprocessing library for extensible-effects-concurrent-0.1.2.1.. Building library for extensible-effects-concurrent-0.1.2.1.. [ 1 of 10] Compiling Control.Eff.Concurrent.MessagePassing ( src/Control/Eff/Concurrent/MessagePassing.hs, dist/build/Control/Eff/Concurrent/MessagePassing.o ) [ 2 of 10] Compiling Control.Eff.Concurrent.GenServer ( src/Control/Eff/Concurrent/GenServer.hs, dist/build/Control/Eff/Concurrent/GenServer.o ) [ 3 of 10] Compiling Control.Eff.ExceptionExtra ( src/Control/Eff/ExceptionExtra.hs, dist/build/Control/Eff/ExceptionExtra.o ) [ 4 of 10] Compiling Control.Eff.Interactive ( src/Control/Eff/Interactive.hs, dist/build/Control/Eff/Interactive.o ) [ 5 of 10] Compiling Control.Eff.Log ( src/Control/Eff/Log.hs, dist/build/Control/Eff/Log.o ) src/Control/Eff/Log.hs:128:11: error: Variable not in scope: flushTQueue :: TQueue message -> STM (t0 message) | 128 | flushTQueue tq | ^^^^^^^^^^^ cabal: Leaving directory '/tmp/cabal-tmp-29238/extensible-effects-concurrent-0.1.2.1' cabal: Error: some packages failed to install: extensible-effects-concurrent-0.1.2.1-EoPIcKgvhAuLnFr3dh11NT failed during the building phase. The exception was: ExitFailure 1