diff --git a/src/Stack/Build/ConstructPlan.hs b/src/Stack/Build/ConstructPlan.hs
index a11efadb57..18de09371b 100644
--- a/src/Stack/Build/ConstructPlan.hs
+++ b/src/Stack/Build/ConstructPlan.hs
@@ -1057,7 +1057,7 @@ pprintExceptions exceptions stackYaml stackRoot parentMap wanted' prunedGlobalDe
     pprintExtra (name, (version, BlobKey cabalHash cabalSize)) =
       let cfInfo = CFIHash cabalHash (Just cabalSize)
           packageIdRev = PackageIdentifierRevision name version cfInfo
-       in "- " <+> fromString (T.unpack (utf8BuilderToText (RIO.display packageIdRev)))
+       in fromString ("- " ++ T.unpack (utf8BuilderToText (RIO.display packageIdRev)))
 
     allNotInBuildPlan = Set.fromList $ concatMap toNotInBuildPlan exceptions'
     toNotInBuildPlan (DependencyPlanFailures _ pDeps) =