diff --git a/src/Avalonia.Build.Tasks/XamlCompilerTaskExecutor.cs b/src/Avalonia.Build.Tasks/XamlCompilerTaskExecutor.cs
index 47da2a273d..2d9f14b7f2 100644
--- a/src/Avalonia.Build.Tasks/XamlCompilerTaskExecutor.cs
+++ b/src/Avalonia.Build.Tasks/XamlCompilerTaskExecutor.cs
@@ -85,7 +85,7 @@ namespace Avalonia.Build.Tasks
             if (debuggerLaunch)
             {
                 System.Diagnostics.Debugger.Launch();
-                while(!Debugger.IsAttached) Thread.Sleep(100);
+                while(!System.Diagnostics.Debugger.IsAttached) System.Threading.Thread.Sleep(100);
             }
             var asm = typeSystem.TargetAssemblyDefinition;
             var emres = new EmbeddedResources(asm);