For anyone interested, here's a patch I came up with that seems to fix the build failure. I'm trying now to reach the relevant parties to get this included in the package. diff -rN -u old-hs-plugins/src/System/Plugins/Load.hs new-hs-plugins/src/System/Plugins/Load.hs --- old-hs-plugins/src/System/Plugins/Load.hs 2011-12-30 17:52:37.000000000 -0500 +++ new-hs-plugins/src/System/Plugins/Load.hs 2011-12-30 17:52:37.000000000 -0500 @@ -84,7 +84,9 @@ import System.Directory ( doesFileExist, removeFile ) import Foreign.C.String ( CString, withCString, peekCString ) +#if !MIN_VERSION_ghc(7,2,0) import GHC ( defaultCallbacks ) +#endif import GHC.Ptr ( Ptr(..), nullPtr ) import GHC.Exts ( addrToHValue# ) import GHC.Prim ( unsafeCoerce# ) @@ -99,7 +101,12 @@ readBinIface' :: FilePath -> IO ModIface readBinIface' hi_path = do -- kludgy as hell +#if MIN_VERSION_ghc(7,2,0) + e <- newHscEnv undefined +#else e <- newHscEnv defaultCallbacks undefined +#endif + initTcRnIf 'r' e undefined undefined (readBinIface IgnoreHiWay QuietBinIFaceReading hi_path) -- TODO need a loadPackage p package.conf :: IO () primitive @@ -679,7 +686,11 @@ -- and find some packages to load, as well. let ps = dep_pkgs ds +#if MIN_VERSION_ghc(7,2,0) + ps' <- filterM loaded . map packageIdString . nub $ map fst ps +#else ps' <- filterM loaded . map packageIdString . nub $ ps +#endif #if DEBUG when (not (null ps')) $ On 12/30/11 4:32 PM, Brian Victor wrote:

Hi all,

As a getting-my-feet-wet project I was starting to look into using plugins-auto with the yesod devel server, but I was quickly stymied because the plugins package isn't building on GHC 7.2. The error I get locally is the same as the one reported by hackage[1]. In short, defaultCallbacks seems to be gone from 7.2.

It doesn't look like that function has simply been moved. So can someone give me an idea about how to proceed?

Thanks!

[1] http://hackage.haskell.org/packages/archive/plugins/1.5.1.4/logs/failure/ghc...