Resolving dependencies...
Configuring dotgen-0.4.2...
Building dotgen-0.4.2...
Installed dotgen-0.4.2
Configuring graphmod-1.1...
Building graphmod-1.1...
Failed to install graphmod-1.1
Build log ( /home/builder/.cabal/logs/graphmod-1.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-17796/graphmod-1.1'
Configuring graphmod-1.1...
Building graphmod-1.1...
Preprocessing executable 'graphmod' for graphmod-1.1...
[1 of 8] Compiling HsTokens         ( src/lexer/HsTokens.hs, dist/build/graphmod/graphmod-tmp/HsTokens.o )
[2 of 8] Compiling HsLexerPos       ( src/lexer/HsLexerPos.hs, dist/build/graphmod/graphmod-tmp/HsLexerPos.o )

src/lexer/HsLexerPos.hs:13:1: warning: [-Wtabs]
    Tab character found here, and in four further locations.
    Please use spaces instead.

src/lexer/HsLexerPos.hs:27:7: warning: [-Woverlapping-patterns]
    Pattern match is redundant
    In a case alternative: '\n' -> ...
[3 of 8] Compiling HsLexUtils       ( src/lexer/HsLexUtils.hs, dist/build/graphmod/graphmod-tmp/HsLexUtils.o )

src/lexer/HsLexUtils.hs:32:1: warning: [-Wtabs]
    Tab character found here, and in six further locations.
    Please use spaces instead.
[4 of 8] Compiling HsLex            ( src/lexer/HsLex.hs, dist/build/graphmod/graphmod-tmp/HsLex.o )
[5 of 8] Compiling HsLayoutPre      ( src/lexer/HsLayoutPre.hs, dist/build/graphmod/graphmod-tmp/HsLayoutPre.o )

src/lexer/HsLayoutPre.hs:27:23: warning: [-Wtabs]
    Tab character found here, and in one further location.
    Please use spaces instead.
[6 of 8] Compiling HsLexerPass1     ( src/lexer/HsLexerPass1.hs, dist/build/graphmod/graphmod-tmp/HsLexerPass1.o )
[7 of 8] Compiling Utils            ( src/Utils.hs, dist/build/graphmod/graphmod-tmp/Utils.o )
[8 of 8] Compiling Main             ( src/Main.hs, dist/build/graphmod/graphmod-tmp/Main.o )

src/Main.hs:3:1: error:
    Failed to load interface for ‘Data.Dot’
    Perhaps you meant
      Data.Data (from base-4.9.0.0)
      Data.Int (from base-4.9.0.0)
      Data.Set (needs flag -package-key containers-0.5.7.1)
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-17796/graphmod-1.1'
cabal: Error: some packages failed to install:
graphmod-1.1 failed during the building phase. The exception was:
ExitFailure 1