LHC: Don't use --no-user-package-conf. It doesn't work with ghc-6.8.

Distribution/Simple/LHC.hs

@@ -131,7 +131,7 @@ getInstalledPackages :: Verbosity -> PackageDB -> ProgramConfiguration
                     -> IO (PackageIndex InstalledPackageInfo)
 getInstalledPackages verbosity packagedb conf = do
    (globalDir, userDir) <- getLhcLibDirs verbosity conf
-   let extraArgs = [ "--no-user-package-conf", "--global-conf="++globalDir </> "package.conf"
+   let extraArgs = [ "--global-conf="++globalDir </> "package.conf"
                    , "--package-conf=" ++ case packagedb of
                        SpecificPackageDB path -> path
                        _ -> userDir </> "package.conf"]

Distribution/Simple/Register.hs

@@ -177,7 +177,7 @@ register pkg_descr lbi regFlags
             (libdir installDirs </> "package.conf")
       LHC -> do
         (globalDir, userDir) <- LHC.getLhcLibDirsFromVersion (Just (compilerVersion (compiler lbi)))
-        let config_flags = [ "--force", "--no-user-package-conf", "--global-conf="++globalDir </> "package.conf"
+        let config_flags = [ "--force", "--global-conf="++globalDir </> "package.conf"
                            , "--package-conf=" ++ case packageDB of
                                SpecificPackageDB path -> path
                                _ -> userDir </> "package.conf"]