diff --git a/ILSpy/Analyzers/AnalyzerScope.cs b/ILSpy/Analyzers/AnalyzerScope.cs
index 375380d74..f735be46b 100644
--- a/ILSpy/Analyzers/AnalyzerScope.cs
+++ b/ILSpy/Analyzers/AnalyzerScope.cs
@@ -75,13 +75,8 @@ namespace ICSharpCode.ILSpy.Analyzers
 
 		public IEnumerable<PEFile> GetAllModules()
 		{
-			foreach (var module in AssemblyList.GetAssemblies())
-			{
-				var file = module.GetPEFileOrNull();
-				if (file == null)
-					continue;
-				yield return file;
-			}
+			return AssemblyList.GetAllAssemblies().GetAwaiter().GetResult()
+				.Select(asm => asm.GetPEFileOrNull());
 		}
 
 		public IEnumerable<ITypeDefinition> GetTypesInScope(CancellationToken ct)
@@ -138,7 +133,7 @@ namespace ICSharpCode.ILSpy.Analyzers
 			do
 			{
 				PEFile curFile = toWalkFiles.Pop();
-				foreach (var assembly in AssemblyList.GetAssemblies())
+				foreach (var assembly in AssemblyList.GetAllAssemblies().GetAwaiter().GetResult())
 				{
 					ct.ThrowIfCancellationRequested();
 					bool found = false;
diff --git a/ILSpy/AssemblyList.cs b/ILSpy/AssemblyList.cs
index f2aa07c5b..e01fc44ed 100644
--- a/ILSpy/AssemblyList.cs
+++ b/ILSpy/AssemblyList.cs
@@ -110,6 +110,48 @@ namespace ICSharpCode.ILSpy
 			}
 		}
 
+		/// <summary>
+		/// Gets all loaded assemblies recursively, including assemblies found in bundles or packages.
+		/// </summary>
+		public async Task<IList<LoadedAssembly>> GetAllAssemblies()
+		{
+			var assemblies = GetAssemblies();
+			var results = new List<LoadedAssembly>(assemblies.Length);
+
+			foreach (var asm in assemblies)
+			{
+				var result = await asm.GetLoadResultAsync();
+				if (result.Package != null)
+				{
+					AddDescendants(result.Package.RootFolder);
+				}
+				else if (result.PEFile != null)
+				{
+					results.Add(asm);
+				}
+			}
+
+			void AddDescendants(PackageFolder folder)
+			{
+				foreach (var subFolder in folder.Folders)
+				{
+					AddDescendants(subFolder);
+				}
+
+				foreach (var entry in folder.Entries)
+				{
+					if (!entry.Name.EndsWith(".dll", StringComparison.OrdinalIgnoreCase))
+						continue;
+					var asm = folder.ResolveFileName(entry.Name);
+					if (asm == null)
+						continue;
+					results.Add(asm);
+				}
+			}
+
+			return results;
+		}
+
 		public int Count {
 			get {
 				lock (lockObj)
@@ -233,6 +275,7 @@ namespace ICSharpCode.ILSpy
 		/// </remarks>
 		public LoadedAssembly OpenAssembly(string file, bool isAutoLoaded = false)
 		{
+			file = Path.GetFullPath(file);
 			return OpenAssembly(file, () => {
 				var newAsm = new LoadedAssembly(this, file);
 				newAsm.IsAutoLoaded = isAutoLoaded;
@@ -245,6 +288,7 @@ namespace ICSharpCode.ILSpy
 		/// </summary>
 		public LoadedAssembly OpenAssembly(string file, Stream stream, bool isAutoLoaded = false)
 		{
+			file = Path.GetFullPath(file);
 			return OpenAssembly(file, () => {
 				var newAsm = new LoadedAssembly(this, file, stream: Task.FromResult(stream));
 				newAsm.IsAutoLoaded = isAutoLoaded;
@@ -254,7 +298,6 @@ namespace ICSharpCode.ILSpy
 
 		LoadedAssembly OpenAssembly(string file, Func<LoadedAssembly> load)
 		{
-			file = Path.GetFullPath(file);
 			bool isUIThread = App.Current.Dispatcher.Thread == Thread.CurrentThread;
 
 			LoadedAssembly asm;
diff --git a/ILSpy/Search/SearchPane.cs b/ILSpy/Search/SearchPane.cs
index 263678ee6..5ad005cce 100644
--- a/ILSpy/Search/SearchPane.cs
+++ b/ILSpy/Search/SearchPane.cs
@@ -237,7 +237,7 @@ namespace ICSharpCode.ILSpy
 				MainWindow mainWindow = MainWindow.Instance;
 
 				searchProgressBar.IsIndeterminate = true;
-				startedSearch = new RunningSearch(mainWindow.CurrentAssemblyList.GetAssemblies(), searchTerm,
+				startedSearch = new RunningSearch(await mainWindow.CurrentAssemblyList.GetAllAssemblies(), searchTerm,
 					(SearchMode)searchModeComboBox.SelectedIndex, mainWindow.CurrentLanguage,
 					mainWindow.SessionSettings.FilterSettings.ShowApiLevel);
 				currentSearch = startedSearch;
@@ -290,14 +290,14 @@ namespace ICSharpCode.ILSpy
 		sealed class RunningSearch
 		{
 			readonly CancellationTokenSource cts = new CancellationTokenSource();
-			readonly LoadedAssembly[] assemblies;
+			readonly IList<LoadedAssembly> assemblies;
 			readonly string[] searchTerm;
 			readonly SearchMode searchMode;
 			readonly Language language;
 			readonly ApiVisibility apiVisibility;
 			public readonly IProducerConsumerCollection<SearchResult> resultQueue = new ConcurrentQueue<SearchResult>();
 
-			public RunningSearch(LoadedAssembly[] assemblies, string searchTerm, SearchMode searchMode, Language language, ApiVisibility apiVisibility)
+			public RunningSearch(IList<LoadedAssembly> assemblies, string searchTerm, SearchMode searchMode, Language language, ApiVisibility apiVisibility)
 			{
 				this.assemblies = assemblies;
 				this.searchTerm = NativeMethods.CommandLineToArgumentArray(searchTerm);
diff --git a/ILSpy/TreeNodes/DerivedTypesEntryNode.cs b/ILSpy/TreeNodes/DerivedTypesEntryNode.cs
index c006f2002..6c16c50c6 100644
--- a/ILSpy/TreeNodes/DerivedTypesEntryNode.cs
+++ b/ILSpy/TreeNodes/DerivedTypesEntryNode.cs
@@ -84,8 +84,7 @@ namespace ICSharpCode.ILSpy.TreeNodes
 		IEnumerable<ILSpyTreeNode> FetchChildren(CancellationToken ct)
 		{
 			// FetchChildren() runs on the main thread; but the enumerator will be consumed on a background thread
-			var assemblies = list.GetAssemblies().Select(node => node.GetPEFileOrNull()).Where(asm => asm != null).ToArray();
-			return DerivedTypesTreeNode.FindDerivedTypes(list, type, assemblies, ct);
+			return DerivedTypesTreeNode.FindDerivedTypes(list, type, ct);
 		}
 
 		public override void ActivateItem(System.Windows.RoutedEventArgs e)