Resolving dependencies... Configuring data-default-class-0.1.2.0... Configuring dlist-0.8.0.2... Building data-default-class-0.1.2.0... Building dlist-0.8.0.2... Installed data-default-class-0.1.2.0 Configuring microlens-0.4.7.0... Building microlens-0.4.7.0... Installed dlist-0.8.0.2 Configuring mtl-2.2.1... Building mtl-2.2.1... Configuring old-locale-1.0.0.7... Installed microlens-0.4.7.0 Building old-locale-1.0.0.7... Configuring primitive-0.6.1.0... Installed old-locale-1.0.0.7 Configuring parallel-3.2.1.0... Installed mtl-2.2.1 Building primitive-0.6.1.0... Building parallel-3.2.1.0... Configuring stm-2.4.4.1... Installed parallel-3.2.1.0 Building stm-2.4.4.1... Configuring transformers-compat-0.5.1.4... Installed primitive-0.6.1.0 Building transformers-compat-0.5.1.4... Configuring text-1.2.2.1... Installed stm-2.4.4.1 Building text-1.2.2.1... Configuring utf8-string-1.0.1.1... Installed transformers-compat-0.5.1.4 Building utf8-string-1.0.1.1... Installed utf8-string-1.0.1.1 Configuring data-default-instances-containers-0.0.1... Building data-default-instances-containers-0.0.1... Installed data-default-instances-containers-0.0.1 Configuring data-default-instances-dlist-0.0.1... Building data-default-instances-dlist-0.0.1... Configuring microlens-th-0.4.1.0... Installed data-default-instances-dlist-0.0.1 Building microlens-th-0.4.1.0... Configuring data-default-instances-old-locale-0.0.1... Installed microlens-th-0.4.1.0 Configuring microlens-mtl-0.1.10.0... Installed text-1.2.2.1 Building data-default-instances-old-locale-0.0.1... Building microlens-mtl-0.1.10.0... Configuring vector-0.11.0.0... Installed data-default-instances-old-locale-0.0.1 Building vector-0.11.0.0... Installed microlens-mtl-0.1.10.0 Configuring blaze-builder-0.4.0.2... Building blaze-builder-0.4.0.2... Configuring hashable-1.2.4.0... Installed blaze-builder-0.4.0.2 Building hashable-1.2.4.0... Configuring data-default-0.7.1.1... Installed hashable-1.2.4.0 Building data-default-0.7.1.1... Configuring parsec-3.1.11... Installed data-default-0.7.1.1 Building parsec-3.1.11... Installed parsec-3.1.11 Installed vector-0.11.0.0 Configuring vty-5.14... Building vty-5.14... Installed vty-5.14 Configuring tkhs-0.3.0... Building tkhs-0.3.0... Failed to install tkhs-0.3.0 Build log ( /home/builder/.cabal/logs/tkhs-0.3.0.log ): cabal: Entering directory '/tmp/cabal-tmp-26780/tkhs-0.3.0' Configuring tkhs-0.3.0... Building tkhs-0.3.0... Preprocessing executable 'tkhs' for tkhs-0.3.0... [1 of 5] Compiling Zipper ( src/Zipper.hs, dist/build/tkhs/tkhs-tmp/Zipper.o ) src/Zipper.hs:3:1: warning: [-Wunused-imports] The import of ‘Control.Applicative’ is redundant except perhaps to import instances from ‘Control.Applicative’ To import instances alone, use: import Control.Applicative() src/Zipper.hs:4:1: warning: [-Wunused-imports] The import of ‘Data.Traversable’ is redundant except perhaps to import instances from ‘Data.Traversable’ To import instances alone, use: import Data.Traversable() src/Zipper.hs:5:1: warning: [-Wunused-imports] The import of ‘Data.Foldable’ is redundant except perhaps to import instances from ‘Data.Foldable’ To import instances alone, use: import Data.Foldable() src/Zipper.hs:6:1: warning: [-Wunused-imports] The import of ‘Data.Monoid’ is redundant except perhaps to import instances from ‘Data.Monoid’ To import instances alone, use: import Data.Monoid() [2 of 5] Compiling Vty ( src/Vty.hs, dist/build/tkhs/tkhs-tmp/Vty.o ) src/Vty.hs:36:1: warning: [-Wunused-imports] The import of ‘Control.Applicative’ is redundant except perhaps to import instances from ‘Control.Applicative’ To import instances alone, use: import Control.Applicative() [3 of 5] Compiling Tkhs ( src/Tkhs.hs, dist/build/tkhs/tkhs-tmp/Tkhs.o ) src/Tkhs.hs:21:1: warning: [-Wunused-imports] The import of ‘Control.Applicative’ is redundant except perhaps to import instances from ‘Control.Applicative’ To import instances alone, use: import Control.Applicative() [4 of 5] Compiling Parser ( src/Parser.hs, dist/build/tkhs/tkhs-tmp/Parser.o ) [5 of 5] Compiling Main ( src/Main.hs, dist/build/tkhs/tkhs-tmp/Main.o ) src/Main.hs:7:1: error: Failed to load interface for ‘System.IO.UTF8’ Use -v to see a list of the files searched for. cabal: Leaving directory '/tmp/cabal-tmp-26780/tkhs-0.3.0' cabal: Error: some packages failed to install: tkhs-0.3.0 failed during the building phase. The exception was: ExitFailure 1