Resolving dependencies...
Configuring utf8-string-1.0.1.1...
Configuring text-1.2.2.1...
Building utf8-string-1.0.1.1...
Building text-1.2.2.1...
Installed utf8-string-1.0.1.1
Installed text-1.2.2.1
Configuring sundown-0.5.1...
Building sundown-0.5.1...
Failed to install sundown-0.5.1
Build log ( /home/builder/.cabal/logs/sundown-0.5.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-14553/sundown-0.5.1'
Configuring sundown-0.5.1...
Building sundown-0.5.1...
Preprocessing library sundown-0.5.1...
[1 of 8] Compiling Text.Sundown.Html.Text ( src/Text/Sundown/Html/Text.hs, dist/build/Text/Sundown/Html/Text.o )

src/Text/Sundown/Html/Text.hs:16:1: error:
    Failed to load interface for ‘Text.Sundown.Html’
    Use -v to see a list of the files searched for.

src/Text/Sundown/Html/Text.hs:17:1: error:
    Failed to load interface for ‘Text.Sundown.Html’
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-14553/sundown-0.5.1'
cabal: Error: some packages failed to install:
sundown-0.5.1 failed during the building phase. The exception was:
ExitFailure 1