Resolving dependencies...
Configuring graph-wrapper-0.2.4.2...
Building graph-wrapper-0.2.4.2...
Preprocessing library graph-wrapper-0.2.4.2...
[1 of 2] Compiling Data.Graph.Wrapper.Internal ( Data/Graph/Wrapper/Internal.hs, dist/build/Data/Graph/Wrapper/Internal.o )
[2 of 2] Compiling Data.Graph.Wrapper ( Data/Graph/Wrapper.hs, dist/build/Data/Graph/Wrapper.o )
In-place registering graph-wrapper-0.2.4.2...
Running Haddock for graph-wrapper-0.2.4.2...
Running hscolour for graph-wrapper-0.2.4.2...
Preprocessing library graph-wrapper-0.2.4.2...
Preprocessing library graph-wrapper-0.2.4.2...
Haddock coverage:
  50% (  6 / 12) in 'Data.Graph.Wrapper.Internal'
  92% ( 22 / 24) in 'Data.Graph.Wrapper'
Documentation created: dist/doc/html/graph-wrapper/index.html
Installing library in
/srv/hackage/var/build/tmp-install/lib/x86_64-linux-ghc-7.6.3/graph-wrapper-0.2.4.2
Registering graph-wrapper-0.2.4.2...
Installed graph-wrapper-0.2.4.2
Downloading libcspm-0.1...
Configuring libcspm-0.1...
Building libcspm-0.1...
Preprocessing library libcspm-0.1...
[ 1 of 54] Compiling Util.Monad       ( src/Util/Monad.hs, dist/build/Util/Monad.o )
[ 2 of 54] Compiling Util.List        ( src/Util/List.hs, dist/build/Util/List.o )
[ 3 of 54] Compiling Util.Prelude     ( src/Util/Prelude.hs, dist/build/Util/Prelude.o )
[ 4 of 54] Compiling CSPM.Compiler.Set ( src/CSPM/Compiler/Set.hs, dist/build/CSPM/Compiler/Set.o )
[ 5 of 54] Compiling Util.PrettyPrint ( src/Util/PrettyPrint.hs, dist/build/Util/PrettyPrint.o )
[ 6 of 54] Compiling CSPM.Evaluator.ValueSet[boot] ( src/CSPM/Evaluator/ValueSet.hs-boot, dist/build/CSPM/Evaluator/ValueSet.o-boot )
[ 7 of 54] Compiling Util.Annotated[boot] ( src/Util/Annotated.hs-boot, dist/build/Util/Annotated.o-boot )
[ 8 of 54] Compiling Util.Exception   ( src/Util/Exception.hs, dist/build/Util/Exception.o )

src/Util/Exception.hs:50:10:
    Illegal instance declaration for `PrettyPrintable ErrorMessages'
      (All instance types must be of the form (T a1 ... an)
       where a1 ... an are *distinct type variables*,
       and each type variable appears at most once in the instance head.
       Use -XFlexibleInstances if you want to disable this.)
    In the instance declaration for `PrettyPrintable ErrorMessages'
Failed to install libcspm-0.1
cabal: Error: some packages failed to install:
libcspm-0.1 failed during the building phase. The exception was:
ExitFailure 1