idris failed install

gistfile1.txt

Failed to install trifecta-1.5
Build log ( /Users/karlnilsson/.cabal/logs/trifecta-1.5.log ):
[1 of 1] Compiling Main             ( /var/folders/0_/18mv6y610d39ql2lyl5gtr_80000gn/T/trifecta-1.5-12709/trifecta-1.5/dist/setup/setup.hs, /var/folders/0_/18mv6y610d39ql2lyl5gtr_80000gn/T/trifecta-1.5-12709/trifecta-1.5/dist/setup/Main.o )
Linking /var/folders/0_/18mv6y610d39ql2lyl5gtr_80000gn/T/trifecta-1.5-12709/trifecta-1.5/dist/setup/setup ...
Configuring trifecta-1.5...
Building trifecta-1.5...
Preprocessing library trifecta-1.5...
[ 1 of 13] Compiling Text.Trifecta.Util.Array ( src/Text/Trifecta/Util/Array.hs, dist/build/Text/Trifecta/Util/Array.o )
[ 2 of 13] Compiling Text.Trifecta.Util.Combinators ( src/Text/Trifecta/Util/Combinators.hs, dist/build/Text/Trifecta/Util/Combinators.o )
[ 3 of 13] Compiling Text.Trifecta.Util.IntervalMap ( src/Text/Trifecta/Util/IntervalMap.hs, dist/build/Text/Trifecta/Util/IntervalMap.o )
[ 4 of 13] Compiling Text.Trifecta.Instances ( src/Text/Trifecta/Instances.hs, dist/build/Text/Trifecta/Instances.o )
[ 5 of 13] Compiling Text.Trifecta.Delta ( src/Text/Trifecta/Delta.hs, dist/build/Text/Trifecta/Delta.o )
[ 6 of 13] Compiling Text.Trifecta.Rope ( src/Text/Trifecta/Rope.hs, dist/build/Text/Trifecta/Rope.o )
[ 7 of 13] Compiling Text.Trifecta.Util.It ( src/Text/Trifecta/Util/It.hs, dist/build/Text/Trifecta/Util/It.o )
[ 8 of 13] Compiling Text.Trifecta.Highlight ( src/Text/Trifecta/Highlight.hs, dist/build/Text/Trifecta/Highlight.o )

src/Text/Trifecta/Highlight.hs:46:15:
    Ambiguous occurrence ‘Comment’
    It could refer to either ‘Text.Blaze.Internal.Comment’,
                             imported from ‘Text.Blaze.Internal’ at src/Text/Trifecta/Highlight.hs:35:1-26
                          or ‘Text.Parser.Token.Highlight.Comment’,
                             imported from ‘Text.Parser.Token.Highlight’ at src/Text/Trifecta/Highlight.hs:36:1-34
cabal: Error: some packages failed to install:
idris-0.9.16 depends on trifecta-1.5 which failed to install.
trifecta-1.5 failed during the building phase. The exception was:
ExitFailure 1

Yep that's exactly the same error I'm getting, tried compiling on my native Mac, and Ubuntu VM, and Debian Jessie Docker container.

Any joy with a resolution?

Looks like there's a fix in for this here:

ekmett/trifecta@9b1b350

But not sure how to get that latest version with cabal etc.

Ventured into #idris irc, and Melvar suggested this:

cabal install idris --constraint='blaze-markup < 0.6.3'

Which did the trick!