Resolving dependencies... Configuring ansi-terminal-0.6.2.3... Configuring base-compat-0.9.1... Building ansi-terminal-0.6.2.3... Building base-compat-0.9.1... Configuring dlist-0.8.0.2... Installed ansi-terminal-0.6.2.3 Configuring mtl-2.2.1... Installed base-compat-0.9.1 Building dlist-0.8.0.2... Building mtl-2.2.1... Configuring fgl-5.5.3.0... Installed dlist-0.8.0.2 Building fgl-5.5.3.0... Configuring multiset-0.3.3... Installed mtl-2.2.1 Building multiset-0.3.3... Configuring safe-0.3.10... Installed multiset-0.3.3 Building safe-0.3.10... Configuring primitive-0.6.1.0... Installed safe-0.3.10 Building primitive-0.6.1.0... Configuring time-locale-compat-0.1.1.3... Installed fgl-5.5.3.0 Building time-locale-compat-0.1.1.3... Configuring transformers-compat-0.5.1.4... Installed time-locale-compat-0.1.1.3 Building transformers-compat-0.5.1.4... Configuring text-1.2.2.1... Installed transformers-compat-0.5.1.4 Configuring unexceptionalio-0.3.0... Installed primitive-0.6.1.0 Building text-1.2.2.1... Building unexceptionalio-0.3.0... Installed unexceptionalio-0.3.0 Configuring ansi-wl-pprint-0.6.7.3... Building ansi-wl-pprint-0.6.7.3... Configuring tagged-0.8.5... Installed ansi-wl-pprint-0.6.7.3 Building tagged-0.8.5... Configuring errors-2.1.3... Installed tagged-0.8.5 Building errors-2.1.3... Configuring vector-0.11.0.0... Installed errors-2.1.3 Building vector-0.11.0.0... Installed text-1.2.2.1 Configuring hashable-1.2.4.0... Building hashable-1.2.4.0... Configuring parsec-3.1.11... Installed hashable-1.2.4.0 Building parsec-3.1.11... Configuring unordered-containers-0.2.7.1... Installed parsec-3.1.11 Building unordered-containers-0.2.7.1... Installed unordered-containers-0.2.7.1 Installed vector-0.11.0.0 Configuring scientific-0.3.4.9... Building scientific-0.3.4.9... Installed scientific-0.3.4.9 Configuring attoparsec-0.13.1.0... Building attoparsec-0.13.1.0... Installed attoparsec-0.13.1.0 Configuring aeson-1.0.2.1... Building aeson-1.0.2.1... Installed aeson-1.0.2.1 Configuring algebra-dag-0.1.1.1... Building algebra-dag-0.1.1.1... Installed algebra-dag-0.1.1.1 Configuring algebra-sql-0.1.0.0... Building algebra-sql-0.1.0.0... Failed to install algebra-sql-0.1.0.0 Build log ( /home/builder/.cabal/logs/algebra-sql-0.1.0.0.log ): cabal: Entering directory '/tmp/cabal-tmp-23461/algebra-sql-0.1.0.0' Configuring algebra-sql-0.1.0.0... Building algebra-sql-0.1.0.0... Preprocessing library algebra-sql-0.1.0.0... [ 1 of 22] Compiling Database.Algebra.Table.Lang ( src/Database/Algebra/Table/Lang.hs, dist/build/Database/Algebra/Table/Lang.o ) [ 2 of 22] Compiling Database.Algebra.Table.Render.Dot ( src/Database/Algebra/Table/Render/Dot.hs, dist/build/Database/Algebra/Table/Render/Dot.o ) src/Database/Algebra/Table/Render/Dot.hs:331:31: warning: [-Wtabs] Tab character found here, and in three further locations. Please use spaces instead. [ 3 of 22] Compiling Database.Algebra.Table.Render.JSON ( src/Database/Algebra/Table/Render/JSON.hs, dist/build/Database/Algebra/Table/Render/JSON.o ) src/Database/Algebra/Table/Render/JSON.hs:26:10: error: • Overlapping instances for ToJSON SortSpec arising from a use of ‘aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoJSON’ Matching instances: instance (ToJSON a, ToJSON b) => ToJSON (a, b) -- Defined in ‘aeson-1.0.2.1:Data.Aeson.Types.ToJSON’ instance ToJSON SortSpec -- Defined at src/Database/Algebra/Table/Render/JSON.hs:26:10 • In the expression: aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoJSON @SortSpec In an equation for ‘toJSON’: toJSON = aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoJSON @SortSpec In the instance declaration for ‘ToJSON SortSpec’ src/Database/Algebra/Table/Render/JSON.hs:26:10: error: • Overlapping instances for ToJSON SortSpec arising from a use of ‘aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoEncoding’ Matching instances: instance (ToJSON a, ToJSON b) => ToJSON (a, b) -- Defined in ‘aeson-1.0.2.1:Data.Aeson.Types.ToJSON’ instance ToJSON SortSpec -- Defined at src/Database/Algebra/Table/Render/JSON.hs:26:10 • In the expression: aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoEncoding @SortSpec In an equation for ‘toEncoding’: toEncoding = aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoEncoding @SortSpec In the instance declaration for ‘ToJSON SortSpec’ src/Database/Algebra/Table/Render/JSON.hs:26:10: error: • Overlapping instances for ToJSON SortSpec arising from a use of ‘aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoJSONList’ Matching instances: instance (ToJSON a, ToJSON b) => ToJSON (a, b) -- Defined in ‘aeson-1.0.2.1:Data.Aeson.Types.ToJSON’ instance ToJSON SortSpec -- Defined at src/Database/Algebra/Table/Render/JSON.hs:26:10 • In the expression: aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoJSONList @SortSpec In an equation for ‘toJSONList’: toJSONList = aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoJSONList @SortSpec In the instance declaration for ‘ToJSON SortSpec’ src/Database/Algebra/Table/Render/JSON.hs:26:10: error: • Overlapping instances for ToJSON SortSpec arising from a use of ‘aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoEncodingList’ Matching instances: instance (ToJSON a, ToJSON b) => ToJSON (a, b) -- Defined in ‘aeson-1.0.2.1:Data.Aeson.Types.ToJSON’ instance ToJSON SortSpec -- Defined at src/Database/Algebra/Table/Render/JSON.hs:26:10 • In the expression: aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoEncodingList @SortSpec In an equation for ‘toEncodingList’: toEncodingList = aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoEncodingList @SortSpec In the instance declaration for ‘ToJSON SortSpec’ src/Database/Algebra/Table/Render/JSON.hs:30:10: error: • Overlapping instances for ToJSON (Expr, SortDir) arising from a use of ‘aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoJSON’ Matching instances: instance (ToJSON a, ToJSON b) => ToJSON (a, b) -- Defined in ‘aeson-1.0.2.1:Data.Aeson.Types.ToJSON’ instance ToJSON SortSpec -- Defined at src/Database/Algebra/Table/Render/JSON.hs:26:10 • In the expression: aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoJSON @UnOp In an equation for ‘toJSON’: toJSON = aeson-1.0.2.1:Data.Aeson.Types.ToJSON.$dmtoJSON @UnOp In the instance declaration for ‘ToJSON UnOp’ src/Database/Algebra/Table/Render/JSON.hs:47:10: error: • Overlapping instances for FromJSON SortSpec arising from a use of ‘aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSON’ Matching instances: instance (FromJSON a, FromJSON b) => FromJSON (a, b) -- Defined in ‘aeson-1.0.2.1:Data.Aeson.Types.FromJSON’ instance FromJSON SortSpec -- Defined at src/Database/Algebra/Table/Render/JSON.hs:47:10 • In the expression: aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSON @SortSpec In an equation for ‘parseJSON’: parseJSON = aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSON @SortSpec In the instance declaration for ‘FromJSON SortSpec’ src/Database/Algebra/Table/Render/JSON.hs:47:10: error: • Overlapping instances for FromJSON SortSpec arising from a use of ‘aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSONList’ Matching instances: instance (FromJSON a, FromJSON b) => FromJSON (a, b) -- Defined in ‘aeson-1.0.2.1:Data.Aeson.Types.FromJSON’ instance FromJSON SortSpec -- Defined at src/Database/Algebra/Table/Render/JSON.hs:47:10 • In the expression: aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSONList @SortSpec In an equation for ‘parseJSONList’: parseJSONList = aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSONList @SortSpec In the instance declaration for ‘FromJSON SortSpec’ src/Database/Algebra/Table/Render/JSON.hs:51:10: error: • Overlapping instances for FromJSON (Expr, SortDir) arising from a use of ‘aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSON’ Matching instances: instance (FromJSON a, FromJSON b) => FromJSON (a, b) -- Defined in ‘aeson-1.0.2.1:Data.Aeson.Types.FromJSON’ instance FromJSON SortSpec -- Defined at src/Database/Algebra/Table/Render/JSON.hs:47:10 • In the expression: aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSON @UnOp In an equation for ‘parseJSON’: parseJSON = aeson-1.0.2.1:Data.Aeson.Types.FromJSON.$dmparseJSON @UnOp In the instance declaration for ‘FromJSON UnOp’ cabal: Leaving directory '/tmp/cabal-tmp-23461/algebra-sql-0.1.0.0' cabal: Error: some packages failed to install: algebra-sql-0.1.0.0 failed during the building phase. The exception was: ExitFailure 1