Resolving dependencies... Starting Diff-0.5 Starting OneTuple-0.4.1.1 Starting StateVar-1.2.2 Starting call-stack-0.4.0 Starting cereal-0.5.8.3 Starting data-array-byte-0.1.0.1 Starting data-default-class-0.1.2.0 Starting colour-2.3.6 Starting integer-logarithms-1.0.3.1 Starting parallel-3.2.2.0 Starting network-3.1.4.0 Starting reflection-2.1.7 Starting repline-0.4.2.0 Starting safe-0.3.19 Starting semigroups-0.20 Starting split-0.2.4 Starting tagged-0.8.8 Starting vector-stream-0.1.0.0 Starting void-0.7.3 Starting transformers-compat-0.7.2 Starting base-orphans-0.9.1 Starting prettyprinter-1.7.1 Starting th-compat-0.1.4 Starting hxt-charproperties-9.5.0.0 Starting th-abstraction-0.6.0.0 Building StateVar-1.2.2 Building call-stack-0.4.0 Building Diff-0.5 Building data-array-byte-0.1.0.1 Building OneTuple-0.4.1.1 Building cereal-0.5.8.3 Building th-abstraction-0.6.0.0 Building th-compat-0.1.4 Building base-orphans-0.9.1 Building safe-0.3.19 Building tagged-0.8.8 Building integer-logarithms-1.0.3.1 Building hxt-charproperties-9.5.0.0 Building data-default-class-0.1.2.0 Building semigroups-0.20 Building reflection-2.1.7 Building vector-stream-0.1.0.0 Building colour-2.3.6 Building void-0.7.3 Building split-0.2.4 Building transformers-compat-0.7.2 Building prettyprinter-1.7.1 Building repline-0.4.2.0 Building parallel-3.2.2.0 Building network-3.1.4.0 Completed semigroups-0.20 Completed call-stack-0.4.0 Completed void-0.7.3 Completed StateVar-1.2.2 Starting contravariant-1.5.5 Completed data-default-class-0.1.2.0 Completed integer-logarithms-1.0.3.1 Building contravariant-1.5.5 Completed base-orphans-0.9.1 Completed split-0.2.4 Starting boxes-0.1.5 Completed data-array-byte-0.1.0.1 Starting primitive-0.9.0.0 Starting hashable-1.4.3.0 Completed OneTuple-0.4.1.1 Completed th-compat-0.1.4 Starting network-uri-2.6.4.2 Building boxes-0.1.5 Completed Diff-0.5 Building primitive-0.9.0.0 Building hashable-1.4.3.0 Building network-uri-2.6.4.2 Completed parallel-3.2.2.0 Completed safe-0.3.19 Completed tagged-0.8.8 Starting foldable1-classes-compat-0.1 Starting assoc-1.1 Starting distributive-0.6.2.1 Completed repline-0.4.2.0 Completed transformers-compat-0.7.2 Starting transformers-base-0.4.6 Completed vector-stream-0.1.0.0 Building foldable1-classes-compat-0.1 Building distributive-0.6.2.1 Building assoc-1.1 Completed reflection-2.1.7 Building transformers-base-0.4.6 Completed colour-2.3.6 Starting ansi-terminal-types-0.11.5 Completed th-abstraction-0.6.0.0 Building ansi-terminal-types-0.11.5 Completed boxes-0.1.5 Completed hxt-charproperties-9.5.0.0 Starting hxt-unicode-9.0.2.4 Starting hxt-regex-xmlschema-9.2.0.7 Completed cereal-0.5.8.3 Completed prettyprinter-1.7.1 Building hxt-regex-xmlschema-9.2.0.7 Building hxt-unicode-9.0.2.4 Completed contravariant-1.5.5 Completed transformers-base-0.4.6 Completed assoc-1.1 Completed distributive-0.6.2.1 Completed ansi-terminal-types-0.11.5 Starting ansi-terminal-1.0 Building ansi-terminal-1.0 Completed hashable-1.4.3.0 Starting unordered-containers-0.2.19.1 Building unordered-containers-0.2.19.1 Completed network-uri-2.6.4.2 Completed foldable1-classes-compat-0.1 Starting these-1.2 Starting indexed-traversable-0.1.3 Building these-1.2 Building indexed-traversable-0.1.3 Completed hxt-unicode-9.0.2.4 Completed network-3.1.4.0 Starting hocd-0.1.2.0 Building hocd-0.1.2.0 Completed ansi-terminal-1.0 Starting prettyprinter-ansi-terminal-1.1.3 Failed to install hocd-0.1.2.0 Build log ( /home/builder/.cabal/logs/ghc-9.2.4/hocd-0.1.2.0-38qiFLrMMlj84vtn2e2TIz.log ): cabal: Entering directory '/tmp/cabal-tmp-1137966/hocd-0.1.2.0' Configuring hocd-0.1.2.0... Preprocessing library for hocd-0.1.2.0.. Building library for hocd-0.1.2.0.. [1 of 5] Compiling HOCD.Error ( src/HOCD/Error.hs, dist/build/HOCD/Error.o, dist/build/HOCD/Error.dyn_o ) [2 of 5] Compiling HOCD.Types ( src/HOCD/Types.hs, dist/build/HOCD/Types.o, dist/build/HOCD/Types.dyn_o ) [3 of 5] Compiling HOCD.Command ( src/HOCD/Command.hs, dist/build/HOCD/Command.o, dist/build/HOCD/Command.dyn_o ) [4 of 5] Compiling HOCD.Monad ( src/HOCD/Monad.hs, dist/build/HOCD/Monad.o, dist/build/HOCD/Monad.dyn_o ) src/HOCD/Monad.hs:99:11: error: " Illegal equational constraint m ~ t m' (Use GADTs or TypeFamilies to permit this) " When checking the class method: getSocket :: forall (m :: * -> *). MonadOCD m => m Socket In the class declaration for MonadOCD | 99 | default getSocket | ^^^^^^^^^ cabal: Leaving directory '/tmp/cabal-tmp-1137966/hocd-0.1.2.0' Completed hxt-regex-xmlschema-9.2.0.7 Building prettyprinter-ansi-terminal-1.1.3 Completed primitive-0.9.0.0 Completed indexed-traversable-0.1.3 Completed these-1.2 Completed prettyprinter-ansi-terminal-1.1.3 Completed unordered-containers-0.2.19.1 Error: cabal: Some packages failed to install: emhell-0.1.1.0-9ioO16ahuR48WbDUuhJop2 depends on emhell-0.1.1.0 which failed to install. hocd-0.1.2.0-38qiFLrMMlj84vtn2e2TIz failed during the building phase. The exception was: ExitFailure 1