Perhaps this

Author: grendello

src/Xamarin.Android.Build.Tasks/Xamarin.Android.Common.targets

@@ -1455,7 +1455,7 @@ because xbuild doesn't support framework reference assemblies.
 
 <!-- _PrepareAssemblies lives in Microsoft.Android.Sdk.AssemblyResolution.targets -->
 
-<Target Name="_PrepareNativeAssemblySources" Condition=" '$(AndroidRuntime)' != 'NativeAOT' ">
+<Target Name="_PrepareNativeAssemblySources" Condition=" '$(_AndroidRuntime)' != 'NativeAOT' ">
   <PrepareAbiItems
       BuildTargetAbis="@(_BuildTargetAbis)"
       NativeSourcesDir="$(_NativeAssemblySourceDir)"