diff --git a/src/Xamarin.Android.Build.Tasks/MSBuild/Xamarin/Android/Xamarin.Android.Aapt2.targets b/src/Xamarin.Android.Build.Tasks/MSBuild/Xamarin/Android/Xamarin.Android.Aapt2.targets
index 6baf37a9e36..be0c6c61539 100644
--- a/src/Xamarin.Android.Build.Tasks/MSBuild/Xamarin/Android/Xamarin.Android.Aapt2.targets
+++ b/src/Xamarin.Android.Build.Tasks/MSBuild/Xamarin/Android/Xamarin.Android.Aapt2.targets
@@ -27,7 +27,7 @@ Copyright (C) 2011-2012 Xamarin. All rights reserved.
 
 
 <Target Name="_InjectAaptDependencies">
-  <PropertyGroup Condition="'$(DesignTimeBuild)' != 'True'">
+  <PropertyGroup Condition="'$(DesignTimeBuild)' != 'True' Or ('$(DesignTimeBuild)' == 'True' And '$(AndroidUseManagedDesignTimeResourceGenerator)' == 'False') ">
     <_SetLatestTargetFrameworkVersionDependsOnTargets>
       $(_SetLatestTargetFrameworkVersionDependsOnTargets);
       _CreateAapt2VersionCache;
diff --git a/src/Xamarin.Android.Build.Tasks/MSBuild/Xamarin/Android/Xamarin.Android.Resource.Designer.targets b/src/Xamarin.Android.Build.Tasks/MSBuild/Xamarin/Android/Xamarin.Android.Resource.Designer.targets
index 7c6ae426b60..6392809dded 100644
--- a/src/Xamarin.Android.Build.Tasks/MSBuild/Xamarin/Android/Xamarin.Android.Resource.Designer.targets
+++ b/src/Xamarin.Android.Build.Tasks/MSBuild/Xamarin/Android/Xamarin.Android.Resource.Designer.targets
@@ -58,9 +58,24 @@ Copyright (C) 2016 Xamarin. All rights reserved.
   <Message Text="IntermediateOutputPath: $(IntermediateOutputPath)" />
 </Target>
 
+<Target Name="_GetProjectResourceDirectory" Returns="$(MSBuildProjectDirectory)\$(MonoAndroidResourcePrefix)">
+</Target>
+
+<Target Name="_CollectProjectReferenceResources"
+    Condition="'$(AndroidUseDesignerAssembly)' == 'True' And '$(DesignTimeBuild)' == 'True' "
+>
+  <MSBuild
+      Projects="@(ProjectReference)"
+      Targets="Restore;_GetProjectResourceDirectory"
+      SkipNonexistentTargets="true"
+  >
+    <Output TaskParameter="TargetOutputs" ItemName="LibraryResourceDirectories" />
+  </MSBuild>
+</Target>
+
 <Target Name="_GenerateRtxt"
     Condition="'$(AndroidUseDesignerAssembly)' == 'True' And '$(DesignTimeBuild)' == 'True' "
-    DependsOnTargets="_CreatePropertiesCache;_ResolveSdks;_ResolveAndroidTooling;_GetJavaPlatformJar;_GenerateAndroidResourceDir;_SetupDesignerProperties"
+    DependsOnTargets="_CreatePropertiesCache;_ResolveSdks;_ResolveAndroidTooling;_GetJavaPlatformJar;_GenerateAndroidResourceDir;_SetupDesignerProperties;_CollectProjectReferenceResources"
     Inputs="$(_AndroidResFlagFile);@(_AndroidResourceDest);@(LibraryResourceDirectories->'%(StampFile)')"
     Outputs="$(_DesignerIntermediateOutputPath)R.txt"
   >
@@ -78,7 +93,7 @@ Copyright (C) 2016 Xamarin. All rights reserved.
 </Target>
 
 <Target Name="_GenerateResourceCaseMap"
-    DependsOnTargets="_ComputeAndroidResourcePaths;_SetupDesignerProperties;_GetLibraryImports"
+    DependsOnTargets="_ComputeAndroidResourcePaths;_SetupDesignerProperties;_GetLibraryImports;_CollectProjectReferenceResources"
     Inputs="@(_AndroidResourceDest);@(LibraryResourceDirectories->'%(StampFile)')"
     Outputs="$(_GenerateResourceCaseMapFile)"
   >
diff --git a/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/IncrementalBuildTest.cs b/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/IncrementalBuildTest.cs
index e4da47a23a4..ce1079fcf26 100644
--- a/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/IncrementalBuildTest.cs
+++ b/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/IncrementalBuildTest.cs
@@ -1179,14 +1179,19 @@ public void DesignTimeBuild ()
 				Assert.IsTrue (b.DesignTimeBuild (proj), "first dtb should have succeeded.");
 				var target = "_GenerateResourceDesignerAssembly";
 				Assert.IsFalse (b.Output.IsTargetSkipped (target), $"`{target}` should not have been skipped.");
+				var importsTarget = "_ResolveLibraryProjectImports";
+				Assert.IsTrue (b.Output.IsTargetSkipped (importsTarget, defaultIfNotUsed: true), $"`{importsTarget}` should have been skipped.");
 				// DesignTimeBuild=true lowercased
 				var parameters = new [] { "DesignTimeBuild=true" };
 				Assert.IsTrue (b.RunTarget (proj, "Compile", doNotCleanupOnUpdate: true, parameters: parameters), "second dtb should have succeeded.");
 				Assert.IsTrue (b.Output.IsTargetSkipped (target, defaultIfNotUsed: true), $"`{target}` should have been skipped.");
+				Assert.IsTrue (b.Output.IsTargetSkipped (importsTarget, defaultIfNotUsed: true), $"`{importsTarget}` should have been skipped.");
 				Assert.IsTrue (b.RunTarget (proj, "UpdateGeneratedFiles", doNotCleanupOnUpdate: true, parameters: parameters), "UpdateGeneratedFiles should have succeeded.");
 				Assert.IsTrue (b.Output.IsTargetSkipped (target, defaultIfNotUsed: true), $"`{target}` should have been skipped.");
+				Assert.IsTrue (b.Output.IsTargetSkipped (importsTarget, defaultIfNotUsed: true), $"`{importsTarget}` should have been skipped.");
 				Assert.IsTrue (b.Build (proj, doNotCleanupOnUpdate: true, saveProject: false), "full build should have succeeded.");
 				Assert.IsFalse (b.Output.IsTargetSkipped (target), $"`{target}` should not have been skipped.");
+				Assert.IsFalse (b.Output.IsTargetSkipped (importsTarget), $"`{importsTarget}` should not have been skipped.");
 			}
 		}
 
diff --git a/src/Xamarin.Android.Build.Tasks/Xamarin.Android.EmbeddedResource.targets b/src/Xamarin.Android.Build.Tasks/Xamarin.Android.EmbeddedResource.targets
index 71f5196abdc..81f38712cdb 100644
--- a/src/Xamarin.Android.Build.Tasks/Xamarin.Android.EmbeddedResource.targets
+++ b/src/Xamarin.Android.Build.Tasks/Xamarin.Android.EmbeddedResource.targets
@@ -33,7 +33,6 @@ This file is used by all project types, including binding projects.
   </PropertyGroup>
 
   <Target Name="_ResolveLibraryProjectImports"
-      Condition=" '$(DesignTimeBuild)' != 'True' "
       DependsOnTargets="$(CoreResolveReferencesDependsOn)"
       Inputs="$(ProjectAssetsFile);$(MSBuildProjectFullPath);@(_MonoAndroidReferencePath);@(_MonoAndroidReferenceDependencyPaths);@(AndroidAarLibrary);$(_AndroidBuildPropertiesCache)"
       Outputs="$(_AndroidStampDirectory)_ResolveLibraryProjectImports.stamp">
@@ -57,7 +56,9 @@ This file is used by all project types, including binding projects.
     </ItemGroup>
   </Target>
 
-  <Target Name="_ExtractLibraryProjectImports" DependsOnTargets="_ResolveLibraryProjectImports" Condition=" '$(DesignTimeBuild)' != 'True' ">
+  <Target Name="_ExtractLibraryProjectImports"
+      DependsOnTargets="_ResolveLibraryProjectImports"
+  >
     <ReadLibraryProjectImportsCache
         CacheFile="$(_AndroidLibraryProjectImportsCache)">
       <Output TaskParameter="ResolvedResourceDirectories" ItemName="LibraryResourceDirectories" />