Dear Haskell libraries maintainers, I have recently uploaded a package to Hackage and got a build failure: http://hackage.haskell.org/packages/archive/ForSyDe/3.1.1/logs/failure/ghc-6... The error looks to be due to dependencies on multiple versions of some Haskell libraries built on Hackage. In particular, depending on both "directory" and "process" leads to indirect dependencies on unix-2.4.0.1 and 2.4.0.2. The same situation is there for "containers" and "regex-posix" which results to multiple dependency on array-0.3.0.0 and 0.3.0.1. I asked about this matter on #haskell. They said it is because of the centralized build mechanism of Hackage which hopefully will be improved with the new servers. But, for the short term I should ask the maintainers to rebuild the deps. I would like to ask if you confirm the cause of error. Also, since many packages depend on these Haskell libraries, I guess other people might also have the same problem. Do you have any plans to rebuild these packages on Hackage? Regards, -- Hosein Attarzadeh