Resolving dependencies... Configuring StateVar-1.1.1.0... Configuring base-compat-0.10.4... Building StateVar-1.1.1.0... Building base-compat-0.10.4... Installed StateVar-1.1.1.0 Configuring base-orphans-0.8... Building base-orphans-0.8... Installed base-orphans-0.8 Configuring cabal-doctest-1.0.6... Building cabal-doctest-1.0.6... Installed base-compat-0.10.4 Configuring call-stack-0.1.0... Building call-stack-0.1.0... Installed call-stack-0.1.0 Configuring dlist-0.8.0.4... Installed cabal-doctest-1.0.6 Configuring hashable-1.2.7.0... Building dlist-0.8.0.4... Building hashable-1.2.7.0... Installed dlist-0.8.0.4 Configuring integer-logarithms-1.0.2.1... Building integer-logarithms-1.0.2.1... Installed hashable-1.2.7.0 Configuring old-locale-1.0.0.7... Building old-locale-1.0.0.7... Installed integer-logarithms-1.0.2.1 Configuring parallel-3.2.1.1... Building parallel-3.2.1.1... Installed old-locale-1.0.0.7 Configuring primitive-0.6.4.0... Building primitive-0.6.4.0... Installed parallel-3.2.1.1 Configuring random-1.1... Building random-1.1... Installed random-1.1 Configuring reflection-2.1.4... Building reflection-2.1.4... Installed reflection-2.1.4 Configuring safe-0.3.17... Installed primitive-0.6.4.0 Configuring semigroups-0.18.5... Building safe-0.3.17... Building semigroups-0.18.5... Installed semigroups-0.18.5 Configuring tagged-0.8.6... Building tagged-0.8.6... Installed safe-0.3.17 Configuring th-abstraction-0.2.8.0... Building th-abstraction-0.2.8.0... Installed tagged-0.8.6 Configuring time-locale-compat-0.1.1.4... Building time-locale-compat-0.1.1.4... Installed time-locale-compat-0.1.1.4 Configuring transformers-compat-0.6.2... Building transformers-compat-0.6.2... Installed th-abstraction-0.2.8.0 Configuring void-0.7.2... Building void-0.7.2... Installed void-0.7.2 Configuring contravariant-1.5... Building contravariant-1.5... Installed transformers-compat-0.6.2 Configuring unordered-containers-0.2.9.0... Building unordered-containers-0.2.9.0... Installed contravariant-1.5 Configuring digestive-functors-0.8.3.0... Building digestive-functors-0.8.3.0... Failed to install digestive-functors-0.8.3.0 Build log ( /home/builder/.cabal/logs/ghc-8.4.3/digestive-functors-0.8.3.0-lFqAoSc2kP4YJ8LH5MNfW.log ): cabal: Entering directory '/tmp/cabal-tmp-18007/digestive-functors-0.8.3.0' Configuring digestive-functors-0.8.3.0... Preprocessing library for digestive-functors-0.8.3.0.. Building library for digestive-functors-0.8.3.0.. [ 1 of 10] Compiling Text.Digestive.Ref ( src/Text/Digestive/Ref.hs, dist/build/Text/Digestive/Ref.o ) [ 2 of 10] Compiling Text.Digestive.Types ( src/Text/Digestive/Types.hs, dist/build/Text/Digestive/Types.o ) [ 3 of 10] Compiling Text.Digestive.Form.Internal.Field ( src/Text/Digestive/Form/Internal/Field.hs, dist/build/Text/Digestive/Form/Internal/Field.o ) [ 4 of 10] Compiling Text.Digestive.Util ( src/Text/Digestive/Util.hs, dist/build/Text/Digestive/Util.o ) [ 5 of 10] Compiling Text.Digestive.Form.List ( src/Text/Digestive/Form/List.hs, dist/build/Text/Digestive/Form/List.o ) [ 6 of 10] Compiling Text.Digestive.Form.Internal ( src/Text/Digestive/Form/Internal.hs, dist/build/Text/Digestive/Form/Internal.o ) [ 7 of 10] Compiling Text.Digestive.Form.Encoding ( src/Text/Digestive/Form/Encoding.hs, dist/build/Text/Digestive/Form/Encoding.o ) src/Text/Digestive/Form/Encoding.hs:42:10: error: • No instance for (Semigroup FormEncType) arising from the superclasses of an instance declaration • In the instance declaration for ‘Monoid FormEncType’ | 42 | instance Monoid FormEncType where | ^^^^^^^^^^^^^^^^^^ cabal: Leaving directory '/tmp/cabal-tmp-18007/digestive-functors-0.8.3.0' Configuring uuid-types-1.0.3... Building uuid-types-1.0.3... Installed unordered-containers-0.2.9.0 Installed uuid-types-1.0.3 cabal: Error: some packages failed to install: digestive-functors-0.8.3.0-lFqAoSc2kP4YJ8LH5MNfW failed during the building phase. The exception was: ExitFailure 1 digestive-functors-aeson-1.1.26-L2CjrAE91i4DqdC5djRWyz depends on digestive-functors-aeson-1.1.26 which failed to install.