-resolveDeps :: PackageDBStack -> InstalledPackageInfo -> InstalledPackageInfo
-resolveDeps db_stack p = updateDeps p
+-- ToDo: remove this (see #1837)
+resolveDeps :: PackageDBStack -> InstalledPackageInfo -> IO InstalledPackageInfo
+resolveDeps db_stack p = do
+ when (not (null unversioned_deps)) $
+ hPutStr stderr ("WARNING: unversioned dependencies are deprecated, "++
+ "and will NOT be accepted by GHC 6.10: " ++
+ unwords (map showPackageId unversioned_deps) ++ "\n")
+ return (updateDeps p)