Moving every package that is not ghc or cabal-install to [community]. This will allow better support of the core common haskell libraries since I do not actually use these packages due to cabal-install.
所以就查到了這篇 [SOLVED] Problems upgrading some haskell packages
sudo pacman -Syu 後噴了
:: haskell-transformers: requires ghc=7.6.3-1
pacman -Qs ghc 後也一樣已經安裝了
sudo pacman -Rcs haskell-transformers
sudo pacman -Syu 就可以了
haskell-transformers was recently removed from extra.
It depends on a specific version of ghc.
There is a newer version of ghc in the repos.
Since haskell-transformers was removed there's no upgrade path to resolve the issue.
You'll have to do it manually.
Edit: Removed from the repos entirely.
Not moved from extra to community like the other haskell packages.
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