Resolving dependencies... Configuring wl-pprint-1.2... Building wl-pprint-1.2... Installed wl-pprint-1.2 Configuring js-good-parts-0.0.2... Building js-good-parts-0.0.2... Failed to install js-good-parts-0.0.2 Build log ( /home/builder/.cabal/logs/js-good-parts-0.0.2.log ): cabal: Entering directory '/tmp/cabal-tmp-16102/js-good-parts-0.0.2' Configuring js-good-parts-0.0.2... Building js-good-parts-0.0.2... Preprocessing library js-good-parts-0.0.2... [1 of 3] Compiling Language.JavaScript.NonEmptyList ( src/Language/JavaScript/NonEmptyList.hs, dist/build/Language/JavaScript/NonEmptyList.o ) [2 of 3] Compiling Language.JavaScript.AST ( src/Language/JavaScript/AST.hs, dist/build/Language/JavaScript/AST.o ) [3 of 3] Compiling Language.JavaScript.Pretty ( src/Language/JavaScript/Pretty.hs, dist/build/Language/JavaScript/Pretty.o ) src/Language/JavaScript/Pretty.hs:5:1: error: Failed to load interface for ‘Text.PrettyPrint.Leijen.PrettyPrec’ Use -v to see a list of the files searched for. cabal: Leaving directory '/tmp/cabal-tmp-16102/js-good-parts-0.0.2' cabal: Error: some packages failed to install: js-good-parts-0.0.2 failed during the building phase. The exception was: ExitFailure 1