cabal

When retrieving packages with Cabal, I frequently get errors with this message: user error (Codec.Compression.Zlib: premature end of compressed stream) It looks like Cabal is using my Windows Networking proxy settings (for Privoxy). From digging around Google, Cabal or its libraries appear to have (had) a problem in this area. Possible solutions I can see are: Turn off proxying while using Cabal (not very keen on this one); or Get a patch and start hacking. I'm hesitant to go down this path, as I'm a complete Haskell noob and I'm not yet comfortable with Darcs; or Give it the magic "can I haz

What is the recommended way of having several cabal packages in one directory? Why : I have an old project with many separable modules. Since originally they formed just one program it was, and still is, handy to have them in same directory for easy compiling. Options Just suffer and split everything, including VCS holding the stuff, into different directories? Hack cabal until it is happy with multiple .cabal files in same directory? Make another subdirectory for each module and put .cabal files there along with symlinks to original pieces of code? Something smarter? What? I'd have to

tl;dr: installed library with cabal sandbox, ghci still complains that the library is missing I have a directory where I am developing some Haskell stuff. This used to work fine on another computer, with ghc 7.6, but now that I'm working on another computer with ghc 7.8.2 (I don't know if the version would matter) I get errors like this: Prelude> :l Interpreter.hs Parser.hs:9:8: Could not find module ‘Text.ParserCombinators.Parsec’ Perhaps you meant Text.ParserCombinators.ReadPrec (from base) Text.ParserCombinators.ReadP (from base) Use -v to see a list of the files searched for. when trying

My Linux(redhat6) server has to use http proxy to connect to outside world. While it works for other things like wget, it doesn't work for cabal. cabal update -v3 shows errors like this: 407 - proxy authentication required cabal: Failed to download http://hackage.haskell.org/packages/archive/00-index.tar.gz : ErrorMisc "Unsucessful HTTP code: 407" I tried to change http_proxy environment variable to format like http:// user: passwd at proxy:port, but it doesn't work either. The same problem has been asked here But I'm not allowed use a proxy server like polipo, is there any other way to make

Upon a fresh install of the haskell-platform (via homebrew ) ( GHC x64 7.6.3 ) on OSX 10.9.2 I receive the following warnings when I run ghc-pkg check (see below) Warning: haddock-interfaces: /Users/user/.cabal/share/doc/x86_64-osx-ghc-7.6.3/ghc-mod-3.1.7/html/ghc-mod.haddock doesn't exist or isn't a file Warning: haddock-html: /Users/user/.cabal/share/doc/x86_64-osx-ghc-7.6.3/ghc-mod-3.1.7/html doesn't exist or isn't a directory Warning: haddock-interfaces: /Users/user/.cabal/share/doc/x86_64-osx-ghc-7.6.3/hlint-1.8.59/html/hlint.haddock doesn't exist or isn't a file Warning: haddock-html:

With a clean install of the "Haskell Platform". (OS X Snow-Leopard & Platform 2010.1.0.1), doing this causes simple sequence causes very weird cabal install behaviour: $ cabal install time $ cabal install random $ ghc-pkg list random /Library/Frameworks/GHC.framework/Versions/612/usr/lib/ghc-6.12.1/package.conf.d random-1.0.0.2 /Users/yairc/.ghc/i386-darwin-6.12.1/package.conf.d random-1.0.0.2 random-1.0.0.2 is installed twice in my system. and now doing cabal install random reinstalls random-1.0.0.2 every time. Looks like random depends on time , and cabal wants to reinstall it after there's