Resolving dependencies... Configuring cabal-doctest-1.0.6... Configuring base-orphans-0.6... Building cabal-doctest-1.0.6... Building base-orphans-0.6... Installed base-orphans-0.6 Configuring colour-2.3.4... Building colour-2.3.4... Installed cabal-doctest-1.0.6 Configuring composition-prelude-1.3.0.2... Building composition-prelude-1.3.0.2... Failed to install composition-prelude-1.3.0.2 Build log ( /home/builder/.cabal/logs/ghc-8.2.2/composition-prelude-1.3.0.2-JMpQsnI9aev3ENzH7XpqAx.log ): cabal: Entering directory '/tmp/cabal-tmp-4736/composition-prelude-1.3.0.2' Configuring composition-prelude-1.3.0.2... Preprocessing library for composition-prelude-1.3.0.2.. Building library for composition-prelude-1.3.0.2.. [1 of 1] Compiling Control.Composition ( src/Control/Composition.hs, dist/build/Control/Composition.o ) src/Control/Composition.hs:80:23: error: • Variable not in scope: bisequence :: t (a -> b -> m ()) -> a -> b -> t0 (m a0) • Perhaps you meant one of these: ‘bisequence'’ (line 77), ‘sequence’ (imported from Control.Monad), ‘sequence_’ (imported from Control.Monad) | 80 | biaxe = sequence_ .** bisequence | ^^^^^^^^^^ cabal: Leaving directory '/tmp/cabal-tmp-4736/composition-prelude-1.3.0.2' Configuring fail-4.9.0.0... Building fail-4.9.0.0... Installed fail-4.9.0.0 Installed colour-2.3.4 cabal: Error: some packages failed to install: composition-prelude-1.3.0.2-JMpQsnI9aev3ENzH7XpqAx failed during the building phase. The exception was: ExitFailure 1 language-ats-1.0.1.0-C5NRvci3QyXGnQc3Huai7B depends on language-ats-1.0.1.0 which failed to install.