Resolving dependencies...
Starting     base-orphans-0.8.2
Starting     cereal-0.5.8.1
Starting     StateVar-1.2
Starting     hashable-1.3.0.0
Building     base-orphans-0.8.2
Building     cereal-0.5.8.1
Building     StateVar-1.2
Building     hashable-1.3.0.0
Completed    StateVar-1.2
Starting     old-locale-1.0.0.7
Building     old-locale-1.0.0.7
Completed    hashable-1.3.0.0
Starting     primitive-0.7.1.0
Completed    old-locale-1.0.0.7
Starting     show-combinators-0.2.0.0
Building     primitive-0.7.1.0
Completed    base-orphans-0.8.2
Starting     syb-0.7.1
Building     show-combinators-0.2.0.0
Building     syb-0.7.1
Completed    show-combinators-0.2.0.0
Starting     contravariant-1.5.2
Building     contravariant-1.5.2
Completed    cereal-0.5.8.1
Starting     old-time-1.1.0.3
Completed    syb-0.7.1
Building     old-time-1.1.0.3
Completed    contravariant-1.5.2
Starting     generic-data-0.8.3.0
Building     generic-data-0.8.3.0
Completed    old-time-1.1.0.3
Completed    generic-data-0.8.3.0
Completed    primitive-0.7.1.0
Starting     vector-0.12.1.2
Building     vector-0.12.1.2
Completed    vector-0.12.1.2
Starting     safecopy-0.10.3
Building     safecopy-0.10.3
Completed    safecopy-0.10.3
Starting     ixset-typed-0.5
Building     ixset-typed-0.5
Completed    ixset-typed-0.5
Starting     ixset-typed-hashable-instance-0.1.0.0
Building     ixset-typed-hashable-instance-0.1.0.0
Failed to install ixset-typed-hashable-instance-0.1.0.0
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/ixset-typed-hashable-instance-0.1.0.0-5tVC0RQ3IFmDg18ROFfMLV.log ):
cabal: Entering directory '/tmp/cabal-tmp-19379/ixset-typed-hashable-instance-0.1.0.0'
Configuring ixset-typed-hashable-instance-0.1.0.0...
Preprocessing library for ixset-typed-hashable-instance-0.1.0.0..
Building library for ixset-typed-hashable-instance-0.1.0.0..
[1 of 2] Compiling Data.IxSet.Typed.Hashable ( src/Data/IxSet/Typed/Hashable.hs, dist/build/Data/IxSet/Typed/Hashable.o )

src/Data/IxSet/Typed/Hashable.hs:4:1: error:
    Could not find module ‘Hashable’
    Use -v to see a list of the files searched for.
  |
4 | import Hashable
  | ^^^^^^^^^^^^^^^
cabal: Leaving directory '/tmp/cabal-tmp-19379/ixset-typed-hashable-instance-0.1.0.0'
cabal: Error: some packages failed to install:
ixset-typed-hashable-instance-0.1.0.0-5tVC0RQ3IFmDg18ROFfMLV failed during the
building phase. The exception was:
ExitFailure 1