Resolving dependencies... Configuring base-orphans-0.5.4... Configuring data-default-class-0.1.2.0... Building base-orphans-0.5.4... Building data-default-class-0.1.2.0... Installed base-orphans-0.5.4 Configuring dlist-0.8.0.2... Building dlist-0.8.0.2... Configuring prelude-extras-0.4.0.3... Installed data-default-class-0.1.2.0 Building prelude-extras-0.4.0.3... Configuring mtl-2.2.1... Installed dlist-0.8.0.2 Building mtl-2.2.1... Configuring primitive-0.6.1.0... Installed prelude-extras-0.4.0.3 Building primitive-0.6.1.0... Configuring safe-0.3.10... Installed mtl-2.2.1 Building safe-0.3.10... Configuring split-0.2.3.1... Installed primitive-0.6.1.0 Configuring stm-2.4.4.1... Installed safe-0.3.10 Building split-0.2.3.1... Building stm-2.4.4.1... Configuring semigroups-0.18.2... Installed split-0.2.3.1 Building semigroups-0.18.2... Configuring time-locale-compat-0.1.1.3... Installed stm-2.4.4.1 Building time-locale-compat-0.1.1.3... Configuring text-1.2.2.1... Installed semigroups-0.18.2 Building text-1.2.2.1... Configuring transformers-compat-0.5.1.4... Installed time-locale-compat-0.1.1.3 Building transformers-compat-0.5.1.4... Installed transformers-compat-0.5.1.4 Configuring StateVar-1.1.0.4... Building StateVar-1.1.0.4... Configuring vector-0.11.0.0... Installed StateVar-1.1.0.4 Building vector-0.11.0.0... Configuring async-2.1.1... Installed text-1.2.2.1 Building async-2.1.1... Configuring stm-chans-3.0.0.4... Installed async-2.1.1 Building stm-chans-3.0.0.4... Configuring exceptions-0.8.3... Installed stm-chans-3.0.0.4 Building exceptions-0.8.3... Configuring dlist-instances-0.1.1.1... Installed exceptions-0.8.3 Building dlist-instances-0.1.1.1... Configuring tagged-0.8.5... Installed vector-0.11.0.0 Configuring transformers-base-0.4.4... Installed dlist-instances-0.1.1.1 Building tagged-0.8.5... Building transformers-base-0.4.4... Installed transformers-base-0.4.4 Configuring hashable-1.2.4.0... Building hashable-1.2.4.0... Configuring parsec-3.1.11... Installed tagged-0.8.5 Building parsec-3.1.11... Configuring say-0.1.0.0... Installed hashable-1.2.4.0 Building say-0.1.0.0... Configuring system-filepath-0.4.13.4... Installed say-0.1.0.0 Configuring vector-algorithms-0.7.0.1... Installed parsec-3.1.11 Building vector-algorithms-0.7.0.1... Building system-filepath-0.4.13.4... Configuring chunked-data-0.3.0... Installed system-filepath-0.4.13.4 Building chunked-data-0.3.0... Configuring safe-exceptions-0.1.4.0... Installed chunked-data-0.3.0 Building safe-exceptions-0.1.4.0... Configuring monad-control-1.0.1.0... Installed vector-algorithms-0.7.0.1 Building monad-control-1.0.1.0... Installed safe-exceptions-0.1.4.0 Configuring distributive-0.5.0.2... Configuring unordered-containers-0.2.7.1... Installed monad-control-1.0.1.0 Building unordered-containers-0.2.7.1... Building distributive-0.5.0.2... Configuring constraints-0.8... Installed distributive-0.5.0.2 Building constraints-0.8... Configuring void-0.7.1... Installed unordered-containers-0.2.7.1 Building void-0.7.1... Configuring ReadArgs-1.2.3... Installed void-0.7.1 Installed constraints-0.8 Configuring lifted-base-0.2.3.8... Building ReadArgs-1.2.3... Building lifted-base-0.2.3.8... Configuring mono-traversable-1.0.1... Installed lifted-base-0.2.3.8 Building mono-traversable-1.0.1... Configuring contravariant-1.4... Installed ReadArgs-1.2.3 Building contravariant-1.4... Configuring monad-unlift-0.2.0... Installed contravariant-1.4 Building monad-unlift-0.2.0... Installed monad-unlift-0.2.0 Configuring lifted-async-0.9.0... Building lifted-async-0.9.0... Configuring comonad-5... Installed lifted-async-0.9.0 Configuring basic-prelude-0.6.1... Installed mono-traversable-1.0.1 Building basic-prelude-0.6.1... Building comonad-5... Installed comonad-5 Configuring bifunctors-5.4.1... Building bifunctors-5.4.1... Configuring mutable-containers-0.3.3... Installed basic-prelude-0.6.1 Building mutable-containers-0.3.3... Installed mutable-containers-0.3.3 Installed bifunctors-5.4.1 Configuring semigroupoids-5.1... Configuring profunctors-5.2... Building profunctors-5.2... Building semigroupoids-5.1... Installed profunctors-5.2 Installed semigroupoids-5.1 Configuring free-4.12.4... Building free-4.12.4... Installed free-4.12.4 Configuring adjunctions-4.3... Configuring keys-3.11... Building keys-3.11... Building adjunctions-4.3... Installed keys-3.11 Installed adjunctions-4.3 Configuring kan-extensions-5.0.1... Building kan-extensions-5.0.1... Installed kan-extensions-5.0.1 Configuring pointed-5... Building pointed-5... Installed pointed-5 Configuring vector-instances-3.3.1... Building vector-instances-3.3.1... Installed vector-instances-3.3.1 Configuring mono-traversable-instances-0.1.0.0... Building mono-traversable-instances-0.1.0.0... Installed mono-traversable-instances-0.1.0.0 Configuring classy-prelude-1.0.2... Building classy-prelude-1.0.2... Installed classy-prelude-1.0.2 Downloading neat-interpolation-0.1.0... Configuring neat-interpolation-0.1.0... Building neat-interpolation-0.1.0... Failed to install neat-interpolation-0.1.0 Build log ( /home/builder/.cabal/logs/neat-interpolation-0.1.0.log ): cabal: Entering directory '/tmp/cabal-tmp-30301/neat-interpolation-0.1.0' Configuring neat-interpolation-0.1.0... Building neat-interpolation-0.1.0... Preprocessing library neat-interpolation-0.1.0... [1 of 3] Compiling NeatInterpolation.String ( src/NeatInterpolation/String.hs, dist/build/NeatInterpolation/String.o ) src/NeatInterpolation/String.hs:30:18: error: Ambiguous occurrence ‘foldr’ It could refer to either ‘ClassyPrelude.foldr’, imported from ‘ClassyPrelude’ at src/NeatInterpolation/String.hs:5:1-20 (and originally defined in ‘mono-traversable-1.0.1:Data.MonoTraversable.Unprefixed’) or ‘Data.Foldable.foldr’, imported from ‘Data.Foldable’ at src/NeatInterpolation/String.hs:7:23-27 cabal: Leaving directory '/tmp/cabal-tmp-30301/neat-interpolation-0.1.0' cabal: Error: some packages failed to install: neat-interpolation-0.1.0 failed during the building phase. The exception was: ExitFailure 1