diff --git a/NuGet.Config b/NuGet.Config
index 919cbac06..0b792b9c7 100644
--- a/NuGet.Config
+++ b/NuGet.Config
@@ -1,5 +1,6 @@
 <configuration>
     <packageSources>
+        <add key="LocalNuGetPackages_rx" value="./ref/pkg/rx" />
         <add key="LocalNuGetPackages_wtts" value="./ref/pkg/wtts" />
 		<add key="avalonia-nightly" value="https://pkgs.dev.azure.com/AvaloniaUI/AvaloniaUI/_packaging/avalonia-all/nuget/v3/index.json" protocolVersion="3" />
     </packageSources>
diff --git a/ref/pkg/rx/system.reactive.5.0.1-gd53a04fa44.nupkg b/ref/pkg/rx/system.reactive.5.0.1-gd53a04fa44.nupkg
new file mode 100644
index 000000000..de57f8576
Binary files /dev/null and b/ref/pkg/rx/system.reactive.5.0.1-gd53a04fa44.nupkg differ
diff --git a/src/ImplicitUsings.BCL.cs b/src/ImplicitUsings.BCL.cs
index 5438ee907..a088553e1 100644
--- a/src/ImplicitUsings.BCL.cs
+++ b/src/ImplicitUsings.BCL.cs
@@ -74,7 +74,7 @@ global using Microsoft.Extensions.DependencyInjection;
 global using Microsoft.Extensions.DependencyInjection.Extensions;
 #endif
 
-#if WINDOWS
+#if WINDOWS && !APP_HOST
 global using System.Management;
 #endif