Resolving dependencies... Configuring base-compat-0.9.1... Configuring base-orphans-0.5.4... Building base-compat-0.9.1... Building base-orphans-0.5.4... Installed base-orphans-0.5.4 Configuring dlist-0.8.0.2... Building dlist-0.8.0.2... Configuring mtl-2.2.1... Installed base-compat-0.9.1 Building mtl-2.2.1... Configuring parallel-3.2.1.0... Installed dlist-0.8.0.2 Building parallel-3.2.1.0... Configuring primitive-0.6.1.0... Installed parallel-3.2.1.0 Building primitive-0.6.1.0... Configuring prelude-extras-0.4.0.3... Installed mtl-2.2.1 Building prelude-extras-0.4.0.3... Configuring reflection-2.1.2... Installed primitive-0.6.1.0 Configuring semigroups-0.18.2... Installed prelude-extras-0.4.0.3 Building reflection-2.1.2... Building semigroups-0.18.2... Configuring stm-2.4.4.1... Installed semigroups-0.18.2 Building stm-2.4.4.1... 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 reflection-2.1.2 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 exceptions-0.8.3... Installed StateVar-1.1.0.4 Building exceptions-0.8.3... Configuring vector-0.11.0.0... Installed exceptions-0.8.3 Building vector-0.11.0.0... Configuring tagged-0.8.5... Installed text-1.2.2.1 Building tagged-0.8.5... Installed tagged-0.8.5 Configuring distributive-0.5.0.2... Building distributive-0.5.0.2... Configuring hashable-1.2.4.0... Installed distributive-0.5.0.2 Building hashable-1.2.4.0... Installed hashable-1.2.4.0 Configuring void-0.7.1... Building void-0.7.1... Configuring unordered-containers-0.2.7.1... Installed void-0.7.1 Building unordered-containers-0.2.7.1... Configuring contravariant-1.4... Installed vector-0.11.0.0 Building contravariant-1.4... Configuring scientific-0.3.4.9... Installed contravariant-1.4 Building scientific-0.3.4.9... Configuring comonad-5... Installed unordered-containers-0.2.7.1 Installed scientific-0.3.4.9 Configuring attoparsec-0.13.1.0... Building comonad-5... Building attoparsec-0.13.1.0... Installed comonad-5 Configuring bifunctors-5.4.1... Building bifunctors-5.4.1... Installed attoparsec-0.13.1.0 Configuring aeson-1.0.2.1... Building aeson-1.0.2.1... Installed bifunctors-5.4.1 Configuring semigroupoids-5.1... Building semigroupoids-5.1... Configuring profunctors-5.2... Installed semigroupoids-5.1 Building profunctors-5.2... Installed aeson-1.0.2.1 Installed profunctors-5.2 Configuring free-4.12.4... Building free-4.12.4... Installed free-4.12.4 Configuring adjunctions-4.3... Building adjunctions-4.3... Installed adjunctions-4.3 Configuring kan-extensions-5.0.1... Building kan-extensions-5.0.1... Installed kan-extensions-5.0.1 Configuring lens-4.15.1... Building lens-4.15.1... Installed lens-4.15.1 Configuring stratux-types-0.0.1... Building stratux-types-0.0.1... Failed to install stratux-types-0.0.1 Build log ( /home/builder/.cabal/logs/stratux-types-0.0.1.log ): cabal: Entering directory '/tmp/cabal-tmp-23004/stratux-types-0.0.1' [1 of 1] Compiling Main ( /tmp/cabal-tmp-23004/stratux-types-0.0.1/dist/setup/setup.hs, /tmp/cabal-tmp-23004/stratux-types-0.0.1/dist/setup/Main.o ) Linking /tmp/cabal-tmp-23004/stratux-types-0.0.1/dist/setup/setup ... Configuring stratux-types-0.0.1... Building stratux-types-0.0.1... Preprocessing library stratux-types-0.0.1... [1 of 5] Compiling Data.Aviation.Stratux.Types.TargetType ( src/Data/Aviation/Stratux/Types/TargetType.hs, dist/build/Data/Aviation/Stratux/Types/TargetType.o ) src/Data/Aviation/Stratux/Types/TargetType.hs:37:4: error: • Constraint ‘Num a’ in the type of ‘_TargetTypeNum’ constrains only the class type variables Use ConstrainedClassMethods to allow it • When checking the class method: _TargetTypeNum :: forall a. (AsTargetTypeNum a, Num a, Eq a) => Prism' a TargetType In the class declaration for ‘AsTargetTypeNum’ src/Data/Aviation/Stratux/Types/TargetType.hs:37:4: error: • Constraint ‘Eq a’ in the type of ‘_TargetTypeNum’ constrains only the class type variables Use ConstrainedClassMethods to allow it • When checking the class method: _TargetTypeNum :: forall a. (AsTargetTypeNum a, Num a, Eq a) => Prism' a TargetType In the class declaration for ‘AsTargetTypeNum’ cabal: Leaving directory '/tmp/cabal-tmp-23004/stratux-types-0.0.1' cabal: Error: some packages failed to install: stratux-types-0.0.1 failed during the building phase. The exception was: ExitFailure 1