Resolving dependencies...
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Starting     ecta-1.0.0.1
Building     ecta-1.0.0.1
Failed to install ecta-1.0.0.1
Build log ( /home/builder/.cabal/logs/ghc-8.10.2/ecta-1.0.0.1-2EKblY2qknDLvnx0fUOItD.log ):
cabal: Entering directory '/tmp/cabal-tmp-24207/ecta-1.0.0.1'
Configuring ecta-1.0.0.1...
Preprocessing library for ecta-1.0.0.1..
Building library for ecta-1.0.0.1..
[ 1 of 26] Compiling Data.HashTable.Extended ( src/Data/HashTable/Extended.hs, dist/build/Data/HashTable/Extended.o, dist/build/Data/HashTable/Extended.dyn_o )
[ 2 of 26] Compiling Data.Interned.Extended.HashTableBased ( src/Data/Interned/Extended/HashTableBased.hs, dist/build/Data/Interned/Extended/HashTableBased.o, dist/build/Data/Interned/Extended/HashTableBased.dyn_o )
[ 3 of 26] Compiling Data.Interned.Extended.SingleThreaded ( src/Data/Interned/Extended/SingleThreaded.hs, dist/build/Data/Interned/Extended/SingleThreaded.o, dist/build/Data/Interned/Extended/SingleThreaded.dyn_o )
[ 4 of 26] Compiling Data.Persistent.UnionFind ( src/Data/Persistent/UnionFind.hs, dist/build/Data/Persistent/UnionFind.o, dist/build/Data/Persistent/UnionFind.dyn_o )
[ 5 of 26] Compiling Data.Text.Extended.Pretty ( src/Data/Text/Extended/Pretty.hs, dist/build/Data/Text/Extended/Pretty.o, dist/build/Data/Text/Extended/Pretty.dyn_o )
[ 6 of 26] Compiling Data.Memoization.Metrics ( src/Data/Memoization/Metrics.hs, dist/build/Data/Memoization/Metrics.o, dist/build/Data/Memoization/Metrics.dyn_o )
[ 7 of 26] Compiling Data.Memoization ( src/Data/Memoization.hs, dist/build/Data/Memoization.o, dist/build/Data/Memoization.dyn_o )
[ 8 of 26] Compiling Paths_ecta       ( dist/build/autogen/Paths_ecta.hs, dist/build/Paths_ecta.o, dist/build/Paths_ecta.dyn_o )
[ 9 of 26] Compiling Utility.Fixpoint ( src/Utility/Fixpoint.hs, dist/build/Utility/Fixpoint.o, dist/build/Utility/Fixpoint.dyn_o )
[10 of 26] Compiling Data.ECTA.Internal.Paths ( src/Data/ECTA/Internal/Paths.hs, dist/build/Data/ECTA/Internal/Paths.o, dist/build/Data/ECTA/Internal/Paths.dyn_o )

src/Data/ECTA/Internal/Paths.hs:61:58: error:
    Module Data.Equivalence.Monad does not export classes
   |
61 | import Data.Equivalence.Monad ( runEquivM, equate, desc, classes )
   |                                                          ^^^^^^^
cabal: Leaving directory '/tmp/cabal-tmp-24207/ecta-1.0.0.1'
cabal: Error: some packages failed to install:
ecta-1.0.0.1-2EKblY2qknDLvnx0fUOItD failed during the building phase. The
exception was:
ExitFailure 1