Resolving dependencies...
Downloading hscolour-1.9...
[1 of 1] Compiling Main             ( /tmp/hscolour-1.9-27138/hscolour-1.9/Setup.hs, /tmp/hscolour-1.9-27138/hscolour-1.9/dist/setup/Main.o )
Linking /tmp/hscolour-1.9-27138/hscolour-1.9/dist/setup/setup ...
Configuring hscolour-1.9...
Warning: No 'build-type' specified. If you do not need a custom Setup.hs or
./configure script then use 'build-type: Simple'.
Building hscolour-1.9...
Preprocessing library hscolour-1.9...

Language/Haskell/HsColour.hs:1:1:
    Ambiguous module name `Prelude':
      it was found in multiple packages: base haskell98-2.0.0.2
Failed to install hscolour-1.9
Configuring pcre-light-0.4...
Building pcre-light-0.4...
Preprocessing library pcre-light-0.4...
[1 of 3] Compiling Text.Regex.PCRE.Light.Base ( dist/build/Text/Regex/PCRE/Light/Base.hs, dist/build/Text/Regex/PCRE/Light/Base.o )
[2 of 3] Compiling Text.Regex.PCRE.Light ( Text/Regex/PCRE/Light.hs, dist/build/Text/Regex/PCRE/Light.o )

Text/Regex/PCRE/Light.hs:196:19: Warning:
    In the use of `unsafePerformIO' (imported from Foreign):
    Deprecated: "Use System.IO.Unsafe.unsafePerformIO instead; This function will be removed in the next release"

Text/Regex/PCRE/Light.hs:266:38: Warning:
    In the use of `unsafePerformIO' (imported from Foreign):
    Deprecated: "Use System.IO.Unsafe.unsafePerformIO instead; This function will be removed in the next release"

Text/Regex/PCRE/Light.hs:327:34: Warning:
    In the use of `unsafePerformIO' (imported from Foreign):
    Deprecated: "Use System.IO.Unsafe.unsafePerformIO instead; This function will be removed in the next release"
[3 of 3] Compiling Text.Regex.PCRE.Light.Char8 ( Text/Regex/PCRE/Light/Char8.hs, dist/build/Text/Regex/PCRE/Light/Char8.o )
In-place registering pcre-light-0.4...
Running Haddock for pcre-light-0.4...
Running hscolour for pcre-light-0.4...
Preprocessing library pcre-light-0.4...
Preprocessing library pcre-light-0.4...

Text/Regex/PCRE/Light.hs:196:19: Warning:
    In the use of `unsafePerformIO' (imported from Foreign):
    Deprecated: "Use System.IO.Unsafe.unsafePerformIO instead; This function will be removed in the next release"

Text/Regex/PCRE/Light.hs:266:38: Warning:
    In the use of `unsafePerformIO' (imported from Foreign):
    Deprecated: "Use System.IO.Unsafe.unsafePerformIO instead; This function will be removed in the next release"

Text/Regex/PCRE/Light.hs:327:34: Warning:
    In the use of `unsafePerformIO' (imported from Foreign):
    Deprecated: "Use System.IO.Unsafe.unsafePerformIO instead; This function will be removed in the next release"
Haddock coverage:
  49% ( 47 / 96) in 'Text.Regex.PCRE.Light.Base'
  95% ( 37 / 39) in 'Text.Regex.PCRE.Light'
  97% ( 37 / 38) in 'Text.Regex.PCRE.Light.Char8'
Warning: Text.Regex.PCRE.Light.Base: could not find link destinations for:
    Text.Regex.PCRE.Light.Base.PCREExtra
Documentation created: dist/doc/html/pcre-light/index.html
Installing library in
/srv/hackage/var/build/tmp-install/lib/x86_64-linux-ghc-7.6.3/pcre-light-0.4
Registering pcre-light-0.4...
Installed pcre-light-0.4
cabal: Error: some packages failed to install:
ghc-core-0.3.0.1 depends on hscolour-1.9 which failed to install.
hscolour-1.9 failed during the building phase. The exception was:
ExitFailure 1