diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+# 0.1.1.1
+
+* Only print warning on missing files if index has JSON files
+
 # 0.1.1.0
 
 * `setGetManager`
diff --git a/Stackage/Install.hs b/Stackage/Install.hs
--- a/Stackage/Install.hs
+++ b/Stackage/Install.hs
@@ -53,7 +53,7 @@
                                            doesFileExist,
                                            getAppUserDataDirectory, renameFile)
 import           System.Exit              (ExitCode)
-import           System.FilePath          (takeDirectory, (<.>), (</>))
+import           System.FilePath          (takeDirectory, (<.>), (</>), takeExtension)
 import           System.IO                (IOMode (ReadMode, WriteMode), stdout,
                                            withBinaryFile)
 import           System.Process           (rawSystem, readProcess)
@@ -143,20 +143,22 @@
 getPackageInfo :: FilePath -> Set (String, String) -> IO (Map (String, String) Package)
 getPackageInfo indexTar pkgs0 = withBinaryFile indexTar ReadMode $ \h -> do
     lbs <- L.hGetContents h
-    loop pkgs0 Map.empty $ Tar.read lbs
+    loop pkgs0 Map.empty False $ Tar.read lbs
   where
-    loop pkgs m Tar.Done = do
-        when (not $ Set.null pkgs) $
+    loop pkgs m sawJSON Tar.Done = do
+        when (not (Set.null pkgs) && sawJSON) $
             putStrLn $ "Warning: packages not found in index: " ++ show (Set.toList pkgs)
         return m
-    loop _ m (Tar.Fail e) = throwIO $ Couldn'tReadIndexTarball indexTar e
-    loop pkgs m (Tar.Next e es) =
+    loop _ m _ (Tar.Fail e) = throwIO $ Couldn'tReadIndexTarball indexTar e
+    loop pkgs m sawJSON (Tar.Next e es) =
         case (getName $ Tar.entryPath e, Tar.entryContent e) of
             (Just pair, Tar.NormalFile lbs _)
                     | pair `Set.member` pkgs
                     , Just p <- decode lbs ->
-                loop (Set.delete pair pkgs) (Map.insert pair p m) es
-            _ -> loop pkgs m es
+                loop (Set.delete pair pkgs) (Map.insert pair p m) sawJSON' es
+            _ -> loop pkgs m sawJSON' es
+      where
+        sawJSON' = sawJSON || takeExtension (Tar.entryPath e) == ".json"
 
     getName name =
         case T.splitOn "/" $ T.pack name of
diff --git a/stackage-install.cabal b/stackage-install.cabal
--- a/stackage-install.cabal
+++ b/stackage-install.cabal
@@ -1,5 +1,5 @@
 name:                stackage-install
-version:             0.1.1.0
+version:             0.1.1.1
 synopsis:            Secure download of packages for cabal-install
 description:         For more information, see <https://www.stackage.org/package/stackage-install>
 homepage:            https://github.com/fpco/stackage-install