diff --git a/build.cake b/build.cake
index b6681b8f7..a753542bc 100644
--- a/build.cake
+++ b/build.cake
@@ -1,5 +1,5 @@
 // Load the recipe 
-#load nuget:?package=NUnit.Cake.Recipe&version=1.3.0
+#load nuget:?package=NUnit.Cake.Recipe&version=1.3.1-alpha.1
 // Comment out above line and uncomment below for local tests of recipe changes
 //#load ../NUnit.Cake.Recipe/recipe/*.cake
 
@@ -121,10 +121,15 @@ BuildSettings.Packages.AddRange(new PackageDefinition[] {
             HasFiles("LICENSE.txt", "NOTICES.txt", "CHANGES.txt"),
             HasDirectory("bin/net462").WithFiles("nunit3-console.exe", "nunit3-console.exe.config", 
                 "nunit3-console.pdb").AndFiles(ENGINE_FILES).AndFiles(ENGINE_PDB_FILES),
-            HasDirectory("bin/net462/addins").WithFiles(
-                "nunit.core.dll", "nunit.core.interfaces.dll", "nunit.engine.api.dll", 
-                "nunit.v2.driver.dll", "nunit-project-loader.dll", "nunit-v2-result-writer.dll", 
-                "teamcity-event-listener.dll", "vs-project-loader.dll"),
+            HasDirectory("NUnit.Extension.NUnitProjectLoader.3.8.0"),
+            HasDirectory("NUnit.Extension.NUnitV2Driver.3.9.0"),
+            HasDirectory("NUnit.Extension.NUnitV2ResultWriter.3.8.0"),
+            HasDirectory("NUnit.Extension.TeamCityEventListener.1.0.7"),
+            HasDirectory("NUnit.Extension.VSProjectLoader.3.9.0"),
+            //HasDirectory("bin/net462/addins").WithFiles(
+            //    "nunit.core.dll", "nunit.core.interfaces.dll", "nunit.engine.api.dll", 
+            //    "nunit.v2.driver.dll", "nunit-project-loader.dll", "nunit-v2-result-writer.dll", 
+            //    "teamcity-event-listener.dll", "vs-project-loader.dll"),
             HasDirectory("bin/netcoreapp3.1").WithFiles(ENGINE_CORE_FILES).AndFiles(ENGINE_CORE_PDB_FILES),
             HasDirectory("bin/agents/net462").WithFiles(AGENT_FILES).AndFiles(AGENT_PDB_FILES),
             HasDirectory("bin/agents/net6.0").WithFiles(AGENT_FILES_NETCORE).AndFiles(AGENT_PDB_FILES_NETCORE),
diff --git a/src/NUnitEngine/nunit.engine.core/Services/ExtensionManager.cs b/src/NUnitEngine/nunit.engine.core/Services/ExtensionManager.cs
index a02d1b410..1780eb6ec 100644
--- a/src/NUnitEngine/nunit.engine.core/Services/ExtensionManager.cs
+++ b/src/NUnitEngine/nunit.engine.core/Services/ExtensionManager.cs
@@ -384,6 +384,7 @@ private void ProcessAddinsFile(IFile addinsFile, bool fromWildCard)
                 string entryDir = entry.DirectoryName;
                 string entryFile = entry.FileName;
 
+                log.Debug($"Processing entry {entry.Text}");
                 if (entry.IsDirectory)
                 {
                     if (entry.IsFullyQualified)
@@ -412,9 +413,14 @@ private void ProcessAddinsFile(IFile addinsFile, bool fromWildCard)
 
         private void ProcessCandidateAssembly(string filePath, bool fromWildCard)
         {
+            log.Debug($"Processing candidate assembly {filePath}");
+
             // Did we already process this file?
             if (_assemblies.ByPath.ContainsKey(filePath))
+            {
+                log.Debug("  Skipping assembly already processed");
                 return;
+            }
 
             try
             {
@@ -423,10 +429,12 @@ private void ProcessCandidateAssembly(string filePath, bool fromWildCard)
 
                 // We never add assemblies unless the host can load them
                 if (!CanLoadTargetFramework(Assembly.GetEntryAssembly(), candidateAssembly))
+                {
+                    log.Debug("  Unable to load this assembly");
                     return;
+                }
                 
                 // Do we already have a copy of the same assembly at a different path?
-                //if (_assemblies.ByName.ContainsKey(assemblyName))
                 if (_assemblies.ByName.TryGetValue(assemblyName, out ExtensionAssembly existing))
                 {
                     if (candidateAssembly.IsBetterVersionOf(existing))
@@ -435,6 +443,7 @@ private void ProcessCandidateAssembly(string filePath, bool fromWildCard)
                     return;
                 }
 
+                log.Debug("  Adding this assembly");
                 _assemblies.Add(candidateAssembly);
             }
             catch (BadImageFormatException e)
diff --git a/src/NUnitEngine/nunit.engine/nunit.engine.addins b/src/NUnitEngine/nunit.engine/nunit.engine.addins
index be4c6fa29..4ddd66c2e 100644
--- a/src/NUnitEngine/nunit.engine/nunit.engine.addins
+++ b/src/NUnitEngine/nunit.engine/nunit.engine.addins
@@ -1,5 +1 @@
-addins/nunit.v2.driver.dll
-addins/nunit-v2-result-writer.dll
-addins/nunit-project-loader.dll
-addins/vs-project-loader.dll
-addins/teamcity-event-listener.dll
+../../../bundled-extensions/NUnit.Extension.*/tools/**/
\ No newline at end of file