diff --git a/Directory.Build.props b/Directory.Build.props
index 9d4601ad0..f7bc1b886 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -10,10 +10,4 @@
     <Import Project="$(MSBuildThisFileDirectory)/build/Common.props"/>
     <Import Project="$(MSBuildThisFileDirectory)/build/PackageMetaInfo.props"/>
     <Import Project="$(MSBuildThisFileDirectory)/build/Output.props"/>
-
-    <PropertyGroup>
-        <RestoreSources>
-            https://nuget-feed-nightly.avaloniaui.net/v3/index.json;
-        </RestoreSources>
-    </PropertyGroup>
 </Project>
diff --git a/NuGet.config b/NuGet.config
new file mode 100644
index 000000000..dd4b0a925
--- /dev/null
+++ b/NuGet.config
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+    <packageSources>
+        <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3"/>
+        <add key="avalonia-nightly" value="https://nuget-feed-nightly.avaloniaui.net/v3/index.json" />
+    </packageSources>
+    <packageSourceMapping>
+        <packageSource key="nuget.org">
+            <package pattern="*" />
+        </packageSource>
+        <packageSource key="avalonia-nightly">
+            <package pattern="Avalonia*" />
+        </packageSource>
+    </packageSourceMapping>
+</configuration>
\ No newline at end of file
diff --git a/src/AtomUI.Desktop.Controls/Buttons/SplitButton.cs b/src/AtomUI.Desktop.Controls/Buttons/SplitButton.cs
index a7b14fa2d..1e2db9db7 100644
--- a/src/AtomUI.Desktop.Controls/Buttons/SplitButton.cs
+++ b/src/AtomUI.Desktop.Controls/Buttons/SplitButton.cs
@@ -396,7 +396,7 @@ public class SplitButton : ContentControl,
             _flyoutBindingDisposables?.Dispose();
             _flyoutBindingDisposables = new CompositeDisposable(8);
             
-            _flyoutBindingDisposables.Add(BindUtils.RelayBind(this, PlacementProperty, flyout));
+            _flyoutBindingDisposables.Add(BindUtils.RelayBind(this, PlacementProperty, flyout, Flyout.RequestedPlacementProperty, (PlacementMode v) => (PlacementMode?)v));
             _flyoutBindingDisposables.Add(BindUtils.RelayBind(this, PlacementAnchorProperty, flyout));
             _flyoutBindingDisposables.Add(BindUtils.RelayBind(this, PlacementGravityProperty, flyout));
             _flyoutBindingDisposables.Add(BindUtils.RelayBind(this, IsShowArrowProperty, flyout));
@@ -406,7 +406,7 @@ public class SplitButton : ContentControl,
             _flyoutBindingDisposables.Add(BindUtils.RelayBind(this, ShouldUseOverlayPopupProperty, flyout));
 
             _flyoutBindingDisposables.Add(flyout.GetPropertyChangedObservable(Popup
-                                                    .PlacementProperty)
+                                                    .RequestedPlacementProperty)
                                                 .Subscribe(HandleFlyoutPlacementPropertyChanged));
         }
     }