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 abstract-par-0.3.3 Starting base-compat-0.10.5 Building abstract-par-0.3.3 Building base-compat-0.10.5 Completed abstract-par-0.3.3 Starting base-orphans-0.8 Building base-orphans-0.8 Completed base-orphans-0.8 Starting cereal-0.5.7.0 Building cereal-0.5.7.0 Completed base-compat-0.10.5 Starting data-default-class-0.1.2.0 Building data-default-class-0.1.2.0 Completed data-default-class-0.1.2.0 Starting dlist-0.8.0.5 Building dlist-0.8.0.5 Completed cereal-0.5.7.0 Starting hashable-1.2.7.0 Completed dlist-0.8.0.5 Starting integer-logarithms-1.0.2.2 Building hashable-1.2.7.0 Building integer-logarithms-1.0.2.2 Completed integer-logarithms-1.0.2.2 Starting parallel-3.2.2.0 Building parallel-3.2.2.0 Completed hashable-1.2.7.0 Starting primitive-0.6.4.0 Building primitive-0.6.4.0 Completed parallel-3.2.2.0 Starting random-1.1 Building random-1.1 Completed random-1.1 Starting tagged-0.8.6 Building tagged-0.8.6 Completed tagged-0.8.6 Starting th-abstraction-0.2.8.0 Building th-abstraction-0.2.8.0 Completed primitive-0.6.4.0 Starting time-locale-compat-0.1.1.5 Building time-locale-compat-0.1.1.5 Completed th-abstraction-0.2.8.0 Starting unordered-containers-0.2.9.0 Building unordered-containers-0.2.9.0 Completed time-locale-compat-0.1.1.5 Starting uuid-types-1.0.3 Building uuid-types-1.0.3 Completed uuid-types-1.0.3 Starting monad-par-extras-0.3.3 Building monad-par-extras-0.3.3 Completed monad-par-extras-0.3.3 Starting abstract-deque-0.3 Building abstract-deque-0.3 Completed unordered-containers-0.2.9.0 Starting vector-0.12.0.1 Building vector-0.12.0.1 Completed abstract-deque-0.3 Starting scientific-0.3.6.2 Building scientific-0.3.6.2 Completed scientific-0.3.6.2 Starting attoparsec-0.13.2.2 Building attoparsec-0.13.2.2 Completed attoparsec-0.13.2.2 Completed vector-0.12.0.1 Starting vector-th-unbox-0.2.1.6 Starting vector-binary-instances-0.2.5 Building vector-th-unbox-0.2.1.6 Building vector-binary-instances-0.2.5 Completed vector-th-unbox-0.2.1.6 Starting vector-algorithms-0.8.0.1 Completed vector-binary-instances-0.2.5 Starting aeson-1.4.1.0 Building vector-algorithms-0.8.0.1 Building aeson-1.4.1.0 Completed vector-algorithms-0.8.0.1 Starting math-functions-0.3.0.2 Building math-functions-0.3.0.2 Completed math-functions-0.3.0.2 Starting mwc-random-0.14.0.0 Building mwc-random-0.14.0.0 Completed aeson-1.4.1.0 Starting dense-linear-algebra-0.1.0.0 Completed mwc-random-0.14.0.0 Starting monad-par-0.3.4.8 Building dense-linear-algebra-0.1.0.0 Building monad-par-0.3.4.8 Completed dense-linear-algebra-0.1.0.0 Completed monad-par-0.3.4.8 Starting statistics-0.15.0.0 Building statistics-0.15.0.0 Completed statistics-0.15.0.0 Downloading multilinear-0.2.1 Downloaded multilinear-0.2.1 Starting multilinear-0.2.1 Building multilinear-0.2.1 Failed to install multilinear-0.2.1 Build log ( /home/builder/.cabal/logs/ghc-8.6.1/multilinear-0.2.1-HibVTX7t5gCKIQ8hqlEeXv.log ): cabal: Entering directory '/tmp/cabal-tmp-13611/multilinear-0.2.1' Configuring multilinear-0.2.1... Preprocessing library for multilinear-0.2.1.. Building library for multilinear-0.2.1.. [ 1 of 13] Compiling Multilinear ( src/Multilinear.hs, dist/build/Multilinear.o ) [ 2 of 13] Compiling Multilinear.Index ( src/Multilinear/Index.hs, dist/build/Multilinear/Index.o ) [ 3 of 13] Compiling Multilinear.Class ( src/Multilinear/Class.hs, dist/build/Multilinear/Class.o ) [ 4 of 13] Compiling Multilinear.Index.Finite ( src/Multilinear/Index/Finite.hs, dist/build/Multilinear/Index/Finite.o ) [ 5 of 13] Compiling Multilinear.Index.Infinite ( src/Multilinear/Index/Infinite.hs, dist/build/Multilinear/Index/Infinite.o ) [ 6 of 13] Compiling Multilinear.Generic ( src/Multilinear/Generic.hs, dist/build/Multilinear/Generic.o ) src/Multilinear/Generic.hs:274:10: error: • Could not deduce (Semigroup (Tensor a)) arising from the superclasses of an instance declaration from the context: Num a bound by the instance declaration at src/Multilinear/Generic.hs:(274,10)-(276,26) • In the instance declaration for ‘Monoid (Tensor a)’ | 274 | instance ( | ^... src/Multilinear/Generic.hs:938:13: error: • Could not deduce (Semigroup (Tensor a)) arising from a use of ‘<>’ from the context: Num a bound by the instance declaration at src/Multilinear/Generic.hs:778:10-38 • In the expression: t1' <> t2' In the expression: let t1' = t1 <<<| ind t2' = t2 <<<| ind in t1' <> t2' In an equation for ‘augment’: augment t1 t2 ind = let t1' = t1 <<<| ind t2' = t2 <<<| ind in t1' <> t2' | 938 | in t1' <> t2' | ^^^^^^^^^^ cabal: Leaving directory '/tmp/cabal-tmp-13611/multilinear-0.2.1' cabal: Error: some packages failed to install: multilinear-0.2.1-HibVTX7t5gCKIQ8hqlEeXv failed during the building phase. The exception was: ExitFailure 1