Resolving dependencies...
Configuring call-stack-0.1.0...
Configuring mtl-2.2.1...
Building call-stack-0.1.0...
Building mtl-2.2.1...
Installed call-stack-0.1.0
Configuring HUnit-1.5.0.0...
Building HUnit-1.5.0.0...
Installed mtl-2.2.1
Configuring mtlparse-0.1.4.0...
Building mtlparse-0.1.4.0...
Installed HUnit-1.5.0.0
Installed mtlparse-0.1.4.0
Downloading regexpr-0.2.9...
Configuring regexpr-0.2.9...
Building regexpr-0.2.9...
Failed to install regexpr-0.2.9
Build log ( /home/builder/.cabal/logs/regexpr-0.2.9.log ):
cabal: Entering directory '/tmp/cabal-tmp-27077/regexpr-0.2.9'
Configuring regexpr-0.2.9...
Building regexpr-0.2.9...
Preprocessing library regexpr-0.2.9...
[1 of 7] Compiling Hidden.Tools     ( Hidden/Tools.hs, dist/build/Hidden/Tools.o )

Hidden/Tools.hs:86:1: warning: [-Wtabs]
    Tab character found here, and in one further location.
    Please use spaces instead.
[2 of 7] Compiling Hidden.RegexPRTypes ( Hidden/RegexPRTypes.hs, dist/build/Hidden/RegexPRTypes.o )

Hidden/RegexPRTypes.hs:26:1: error:
    Failed to load interface for ‘Text.ParserCombinators.MTLParse.MTLParse’
    Perhaps you meant
      Text.ParserCombinators.MTLParse.MTLParseCore
      Text.ParserCombinators.MTLParse (from mtlparse-0.1.4.0)
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-27077/regexpr-0.2.9'
cabal: Error: some packages failed to install:
regexpr-0.2.9 failed during the building phase. The exception was:
ExitFailure 1