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valderman / haste-compiler

A GHC-based Haskell to JavaScript compiler
http://haste-lang.org
BSD 3-Clause "New" or "Revised" License
1.45k stars 109 forks source link

Issue installing haste-compiler: Duplicate instance declarations. #382

Closed scottmsul closed 7 years ago

scottmsul commented 8 years ago

I recently tried installing the haste-compiler on my system using cabal install haste-compiler But it raised the following errors:

... [ 7 of 24] Compiling Data.JSTarget.PP ( src/Data/JSTarget/PP.hs, dist/build/hastec/hastec-tmp/Data/JSTarget/PP.o )

src/Data/JSTarget/PP.hs:197:10: Duplicate instance declarations: instance IsString Builder -- Defined at src/Data/JSTarget/PP.hs:197:10 instance IsString Builder -- Defined in `bytestring-builder-0.10.8.1.0:Data.ByteString.Builder' Failed to install haste-compiler-0.4.3 cabal: Error: some packages failed to install: haste-compiler-0.4.3 failed during the building phase. The exception was: ExitFailure 1

Any ideas as to what's causing this? In case it helps, I'm running Ubuntu version 14.04, ghc version 7.6.3, and cabal version 1.16.0.2. I know these aren't fully up-to-date, but they are what comes with APT on Ubuntu.

valderman commented 8 years ago

Unfortunately, support for GHC 7.6 was dropped quite some time ago. The only versions of Haste that will work with it are completely outdated by now and, as evidenced by this issue, don't play well with newer libraries.

I'd recommend either getting a more recent GHC version from Herbert V. Riedel's PPA if you really want to install Haste from Hackage or, better yet, install the pre-built Debian package.

valderman commented 7 years ago

Closing this as the 0.4.3 series is no longer supported. If you really need to stay on the 0.4 branch, try 0.4.4.4 instead, which should fix this issue.