Build #1 for som-10.0.1

[all reports]

Package som-10.0.1
Install BuildFailed
Docs NotTried
Tests NotTried
Time submitted 2018-11-02 06:07:17.213372078 UTC
Compiler ghc-8.6.1
OS linux
Arch x86_64
Dependencies base-, containers-, deepseq-, grid-7.8.10
Flags none

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Build log

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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:

Resolving dependencies...
Starting     grid-7.8.10
Building     grid-7.8.10
Completed    grid-7.8.10
Downloading  som-10.0.1
Downloaded   som-10.0.1
Starting     som-10.0.1
Building     som-10.0.1
Failed to install som-10.0.1
Build log ( /home/builder/.cabal/logs/ghc-8.6.1/som-10.0.1-FpsaQpPPd2WCQeMPuhBOOU.log ):
cabal: Entering directory '/tmp/cabal-tmp-7906/som-10.0.1'
Configuring som-10.0.1...
Preprocessing library for som-10.0.1..
Building library for som-10.0.1..
[1 of 9] Compiling Data.Datamining.Clustering.Classifier ( src/Data/Datamining/Clustering/Classifier.hs, dist/build/Data/Datamining/Clustering/Classifier.o )
[2 of 9] Compiling Data.Datamining.Clustering.DSOMInternal ( src/Data/Datamining/Clustering/DSOMInternal.hs, dist/build/Data/Datamining/Clustering/DSOMInternal.o )

src/Data/Datamining/Clustering/DSOMInternal.hs:83:3: error:
    • Illegal nested constraint ‘G.FiniteGrid (GM.BaseGrid gm p)’
      (Use UndecidableInstances to permit this)
    • In the instance declaration for ‘GM.GridMap (DSOM gm x k) p’
83 |   (F.Foldable gm, GM.GridMap gm p, G.FiniteGrid (GM.BaseGrid gm p)) =>
   |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^...
cabal: Leaving directory '/tmp/cabal-tmp-7906/som-10.0.1'
cabal: Error: some packages failed to install:
som-10.0.1-FpsaQpPPd2WCQeMPuhBOOU failed during the building phase. The
exception was:
ExitFailure 1