Resolving dependencies... Configuring integer-logarithms-1.0.2... Configuring postgresql-libpq-0.9.3.1... Building integer-logarithms-1.0.2... Installed integer-logarithms-1.0.2 Configuring primitive-0.6.2.0... Building primitive-0.6.2.0... Building postgresql-libpq-0.9.3.1... Warning: /tmp/pkgConf-postgresql-libpq-0.9.33040891721303455736.1: Unrecognized field dynamic-library-dirs on line 28 Configuring text-1.2.2.2... Installed postgresql-libpq-0.9.3.1 Building text-1.2.2.2... Installed primitive-0.6.2.0 Installed text-1.2.2.2 Configuring hashable-1.2.6.1... Building hashable-1.2.6.1... Installed hashable-1.2.6.1 Configuring scientific-0.3.5.2... Building scientific-0.3.5.2... Installed scientific-0.3.5.2 Configuring attoparsec-0.13.2.0... Building attoparsec-0.13.2.0... Installed attoparsec-0.13.2.0 Configuring positron-0.1.0.0... Building positron-0.1.0.0... Failed to install positron-0.1.0.0 Build log ( /home/builder/.cabal/logs/positron-0.1.0.0.log ): cabal: Entering directory '/tmp/cabal-tmp-32008/positron-0.1.0.0' Configuring positron-0.1.0.0... Building positron-0.1.0.0... Preprocessing library positron-0.1.0.0... [ 1 of 15] Compiling Positron.Instance ( library/Positron/Instance.hs, dist/build/Positron/Instance.o ) [ 2 of 15] Compiling Positron.Import ( library/Positron/Import.hs, dist/build/Positron/Import.o ) [ 3 of 15] Compiling Positron.Types.MissingMethods ( library/Positron/Types/MissingMethods.hs, dist/build/Positron/Types/MissingMethods.o ) [ 4 of 15] Compiling Positron.Util ( library/Positron/Util.hs, dist/build/Positron/Util.o ) [ 5 of 15] Compiling Positron.UUID ( library/Positron/UUID.hs, dist/build/Positron/UUID.o ) [ 6 of 15] Compiling Positron.Types ( library/Positron/Types.hs, dist/build/Positron/Types.o ) [ 7 of 15] Compiling Positron.Parser ( library/Positron/Parser.hs, dist/build/Positron/Parser.o ) [ 8 of 15] Compiling Positron.Unsafe ( library/Positron/Unsafe.hs, dist/build/Positron/Unsafe.o ) [ 9 of 15] Compiling Positron.Driver ( library/Positron/Driver.hs, dist/build/Positron/Driver.o ) [10 of 15] Compiling Positron.Binary ( library/Positron/Binary.hs, dist/build/Positron/Binary.o ) [11 of 15] Compiling Positron.Store ( library/Positron/Store.hs, dist/build/Positron/Store.o ) [12 of 15] Compiling Positron.Query ( library/Positron/Query.hs, dist/build/Positron/Query.o ) [13 of 15] Compiling Positron.Alias ( library/Positron/Alias.hs, dist/build/Positron/Alias.o ) [14 of 15] Compiling Positron ( library/Positron.hs, dist/build/Positron.o ) library/Positron.hs:164:14: error: Data constructor not in scope: DerivClause :: Maybe a0 -> [Type] -> Pred cabal: Leaving directory '/tmp/cabal-tmp-32008/positron-0.1.0.0' cabal: Error: some packages failed to install: positron-0.1.0.0 failed during the building phase. The exception was: ExitFailure 1