diff --git a/Stackage/Uploads.hs b/Stackage/Uploads.hs
index a6e15114..6847ccf2 100644
--- a/Stackage/Uploads.hs
+++ b/Stackage/Uploads.hs
@@ -2,6 +2,8 @@
 -- uploaders.
 module Stackage.Uploads
     ( checkUploads
+    , printForbidden
+    , filterForbidden
     ) where
 
 import           Control.Exception (assert, evaluate)
@@ -14,13 +16,14 @@ import           Data.Set          (Set)
 import qualified Data.Set          as Set
 import           Data.Time         (UTCTime, parseTime)
 import           Network.HTTP      (getRequest, getResponseBody, simpleHTTP)
+import qualified Stackage.Types    as ST
 import           System.Directory  (doesFileExist)
 import           System.Exit       (exitFailure)
 import           System.Locale
 
 checkUploads :: FilePath -- ^ allowed
              -> FilePath -- ^ new allowed
-             -> IO ()
+             -> IO Forbidden
 checkUploads allowedFP newAllowedFP = do
     putStrLn "Getting upload log"
     uploadLog <- getUploadLog
@@ -37,7 +40,7 @@ checkUploads allowedFP newAllowedFP = do
         putStrLn $ "Newly uploaded packages detected, writing to " ++ newAllowedFP
         writeAllowed newAllowedFP allowed'
 
-    printForbidden forbidden
+    return forbidden
 
 -- Define a Map newtype wrapper with a proper Monoid instance.
 newtype MonoidMap k v = MonoidMap { unMonoidMap :: Map k v }
@@ -151,3 +154,15 @@ printForbidden (MonoidMap forbidden) = unless (Map.null forbidden) $ do
                 , show time
                 ]
     exitFailure
+
+filterForbidden :: ST.BuildPlan
+                -> Forbidden
+                -> Forbidden
+filterForbidden bp =
+    MonoidMap . Map.filterWithKey isIncluded . unMonoidMap
+  where
+    isIncluded pn _ = ST.PackageName pn `Set.member` allPackages
+    allPackages =
+        Map.keysSet (ST.bpPackages bp) `Set.union`
+        ST.bpCore bp `Set.union`
+        Map.keysSet (ST.bpOptionalCore bp)
diff --git a/app/stackage.hs b/app/stackage.hs
index 0a8e002e..636ae8cd 100644
--- a/app/stackage.hs
+++ b/app/stackage.hs
@@ -9,7 +9,7 @@ import           Stackage.Select    (defaultSelectSettings, select)
 import           Stackage.Tarballs  (makeTarballs)
 import           Stackage.Test      (runTestSuites)
 import           Stackage.Types
-import           Stackage.Uploads   (checkUploads)
+import           Stackage.Uploads   (checkUploads, printForbidden)
 import           Stackage.Util      (allowPermissive)
 import           System.Environment (getArgs, getProgName)
 import           System.IO          (hFlush, stdout)
@@ -85,7 +85,7 @@ main :: IO ()
 main = do
     args <- getArgs
     case args of
-        ["uploads"] -> checkUploads "allowed.txt" "new-allowed.txt"
+        ["uploads"] -> checkUploads "allowed.txt" "new-allowed.txt" >>= printForbidden
         "select":rest -> do
             SelectArgs {..} <- parseSelectArgs rest
             ghcVersion <- getGhcVersion