diff --git a/source/dub/dub.d b/source/dub/dub.d
index 59794b7..d2c814e 100644
--- a/source/dub/dub.d
+++ b/source/dub/dub.d
@@ -167,7 +167,7 @@
 				assert(a.pack !is null, "No package specified for removal.");
 				remove(a.pack);
 			}
-			foreach(Action a; filter!((Action a) => a.type == Action.Type.get)(actions)) {
+			foreach(Action a; filter!((Action a) => a.type == Action.Type.fetch)(actions)) {
 				fetch(a.packageId, a.vers, a.location, (options & UpdateOptions.Upgrade) != 0);
 				// never update the same package more than once
 				masterVersionUpgrades[a.packageId] = true;
diff --git a/source/dub/packagemanager.d b/source/dub/packagemanager.d
index 88e118d..f20693b 100644
--- a/source/dub/packagemanager.d
+++ b/source/dub/packagemanager.d
@@ -139,6 +139,21 @@
 		return ret;
 	}
 
+	/** Determines if a package is managed by DUB.
+
+		Managed packages can be upgraded and uninstalled.
+	*/
+	bool isManagedPackage(Package pack)
+	const {
+		auto ppath = pack.basePackage.path;
+		foreach (rep; m_repositories) {
+			auto rpath = rep.packagePath;
+			if (ppath.startsWith(rpath))
+				return true;
+		}
+		return false;
+	}
+
 	int delegate(int delegate(ref Package)) getPackageIterator()
 	{
 		int iterator(int delegate(ref Package) del)
diff --git a/source/dub/project.d b/source/dub/project.d
index 98751a5..a5b09a2 100644
--- a/source/dub/project.d
+++ b/source/dub/project.d
@@ -431,7 +431,7 @@
 
 
 	/// Actions which can be performed to update the application.
-	Action[] determineActions(PackageSupplier[] packageSuppliers, int option)
+	Action[] determineActions(PackageSupplier[] packageSuppliers, UpdateOptions option)
 	{
 		scope(exit) writeDubJson();
 
@@ -491,9 +491,10 @@
 				else logDiagnostic("Triggering retrieval of required package '"~basepkg~"', which doesn't match the required versionh. Required '%s', available '%s'.", d.dependency, p.vers);
 				actions ~= Action.get(basepkg, PlacementLocation.userWide, d.dependency, d.packages);
 			} else {
-				if( option & UpdateOptions.Upgrade ) {
+				if (option & UpdateOptions.Upgrade) {
+					auto existing = m_packageManager.getBestPackage(basepkg, d.dependency);
 					// Only add one upgrade action for each package.
-					if(basepkg !in upgradePackages) {
+					if(basepkg !in upgradePackages && m_packageManager.isManagedPackage(existing)) {
 						logDiagnostic("Required package '"~basepkg~"' found with version '"~p.vers~"', upgrading.");
 						upgradePackages[basepkg] = 1;
 						actions ~= Action.get(basepkg, PlacementLocation.userWide, d.dependency, d.packages);
@@ -662,7 +663,7 @@
 /// Actions to be performed by the dub
 struct Action {
 	enum Type {
-		get,
+		fetch,
 		remove,
 		conflict,
 		failure
@@ -679,7 +680,7 @@
 
 	static Action get(string pkg, PlacementLocation location, in Dependency dep, Dependency[string] context)
 	{
-		return Action(Type.get, pkg, location, dep, context);
+		return Action(Type.fetch, pkg, location, dep, context);
 	}
 
 	static Action remove(Package pkg, Dependency[string] context)