mkModDeps :: [(ModuleName, IsBootInterface)]
          -> ModuleNameEnv (ModuleName, IsBootInterface)
mkModDeps deps = foldl add emptyUFM deps
               where
                 add env elt@(m,_) = addToUFM env m elt
mkModDeps :: [(ModuleName, IsBootInterface)]
          -> ModuleNameEnv (ModuleName, IsBootInterface)
mkModDeps deps = foldl add emptyUFM deps
               where
                 add env elt@(m,_) = addToUFM env m elt
mkModDeps deps = foldl add emptyUFM deps
               where
                 add env elt@(m,_) = addToUFM env m elt