Warning: The install command is a part of the legacy v1 style of cabal usage. Please switch to using either the new project style and the new-install command or the legacy v1-install alias as new-style projects will become the default in the next version of cabal-install. Please file a bug if you cannot replicate a working v1- use case with the new-style commands. For more information, see: https://wiki.haskell.org/Cabal/NewBuild Resolving dependencies... Starting StateVar-1.2 Starting binary-orphans-1.0.1 Starting cabal-doctest-1.0.8 Starting base-orphans-0.8.1 Building StateVar-1.2 Building binary-orphans-1.0.1 Building base-orphans-0.8.1 Building cabal-doctest-1.0.8 Completed binary-orphans-1.0.1 Starting cereal-0.5.8.1 Completed base-orphans-0.8.1 Starting hashable-1.3.0.0 Completed StateVar-1.2 Starting integer-logarithms-1.0.3 Building cereal-0.5.8.1 Building hashable-1.3.0.0 Building integer-logarithms-1.0.3 Completed cabal-doctest-1.0.8 Starting primitive-0.7.0.0 Building primitive-0.7.0.0 Completed integer-logarithms-1.0.3 Starting semigroups-0.19.1 Building semigroups-0.19.1 Completed hashable-1.3.0.0 Starting tagged-0.8.6 Completed semigroups-0.19.1 Starting th-abstraction-0.3.1.0 Building tagged-0.8.6 Building th-abstraction-0.3.1.0 Completed cereal-0.5.8.1 Starting transformers-compat-0.6.5 Building transformers-compat-0.6.5 Completed tagged-0.8.6 Starting void-0.7.3 Building void-0.7.3 Completed void-0.7.3 Starting contravariant-1.5.2 Completed th-abstraction-0.3.1.0 Starting unordered-containers-0.2.10.0 Building contravariant-1.5.2 Building unordered-containers-0.2.10.0 Completed transformers-compat-0.6.5 Starting distributive-0.6.1 Completed contravariant-1.5.2 Building distributive-0.6.1 Completed primitive-0.7.0.0 Starting scientific-0.3.6.2 Starting vector-0.12.0.3 Building scientific-0.3.6.2 Building vector-0.12.0.3 Completed distributive-0.6.1 Starting comonad-5.0.5 Building comonad-5.0.5 Completed scientific-0.3.6.2 Completed unordered-containers-0.2.10.0 Starting bytes-0.16 Building bytes-0.16 Completed comonad-5.0.5 Starting bifunctors-5.5.5 Building bifunctors-5.5.5 Completed bytes-0.16 Completed bifunctors-5.5.5 Starting semigroupoids-5.3.3 Building semigroupoids-5.3.3 Completed vector-0.12.0.3 Completed semigroupoids-5.3.3 Starting log-domain-0.13 Building log-domain-0.13 Completed log-domain-0.13 Starting semiring-num-1.6.0.3 Building semiring-num-1.6.0.3 Failed to install semiring-num-1.6.0.3 Build log ( /home/builder/.cabal/logs/ghc-8.6.3/semiring-num-1.6.0.3-6Ro6vmce12DLxKt3NxaKjd.log ): cabal: Entering directory '/tmp/cabal-tmp-30293/semiring-num-1.6.0.3' Configuring semiring-num-1.6.0.3... Preprocessing library for semiring-num-1.6.0.3.. Building library for semiring-num-1.6.0.3.. [1 of 7] Compiling Data.Semiring.Newtype ( src/Data/Semiring/Newtype.hs, dist/build/Data/Semiring/Newtype.o ) [2 of 7] Compiling Data.Semiring.TH ( src/Data/Semiring/TH.hs, dist/build/Data/Semiring/TH.o ) [3 of 7] Compiling Data.Semiring ( src/Data/Semiring.hs, dist/build/Data/Semiring.o ) src/Data/Semiring.hs:653:11: error: Not in scope: type constructor or class ‘Precise’ | 653 | instance (Precise a, RealFloat a) => Semiring (Log a) where | ^^^^^^^ src/Data/Semiring.hs:668:11: error: Not in scope: type constructor or class ‘Precise’ | 668 | instance (Precise a, RealFloat a) => DetectableZero (Log a) where | ^^^^^^^ src/Data/Semiring.hs:672:11: error: Not in scope: type constructor or class ‘Precise’ | 672 | instance (Precise a, RealFloat a) => Semiring (SignedLog a) where | ^^^^^^^ src/Data/Semiring.hs:685:11: error: Not in scope: type constructor or class ‘Precise’ | 685 | instance (Precise a, RealFloat a) => DetectableZero (SignedLog a) where | ^^^^^^^ cabal: Leaving directory '/tmp/cabal-tmp-30293/semiring-num-1.6.0.3' cabal: Error: some packages failed to install: semiring-num-1.6.0.3-6Ro6vmce12DLxKt3NxaKjd failed during the building phase. The exception was: ExitFailure 1