Avoid unnecessary recompilation

Author: snoyberg

src/Stack/Build/Cache.hs

@@ -128,8 +128,10 @@ writeConfigCache dir = writeCache dir configCacheFile
 deleteCaches :: (MonadIO m, MonadReader env m, HasConfig env, MonadLogger m, MonadThrow m, HasEnvConfig env)
              => Path Abs Dir -> m ()
 deleteCaches dir = do
+    {- FIXME confirm that this is acceptable to remove
     bfp <- buildCacheFile dir
     removeFileIfExists bfp
+    -}
     cfp <- configCacheFile dir
     removeFileIfExists cfp
 

src/Stack/Build/ConstructPlan.hs

@@ -160,6 +160,8 @@ mkUnregisterLocal tasks locallyRegistered =
 
 addFinal :: LocalPackage -> M ()
 addFinal lp = do
+    void $ addDep $ packageName package
+
     depsRes <- addPackageDeps package
     res <- case depsRes of
         Left e -> return $ Left e