PR feedback

build/Rx.props

@@ -5,7 +5,6 @@
     <PackageReference Include="System.Reactive.Interfaces" Version="3.1.0" />
     <PackageReference Include="System.Reactive.Linq" Version="3.1.0" />
     <PackageReference Include="System.Reactive.PlatformServices" Version="3.1.0" />
-    <PackageReference Condition="'$(TargetFramework)' == 'net45'" Include="System.Reactive.Windows.Threading" Version="3.1.0" />
-    <PackageReference Condition="'$(TargetFramework)' == 'net461'" Include="System.Reactive.Windows.Threading" Version="3.1.0" />
+    <PackageReference Condition="$(TargetFramework.StartsWith('net4'))" Include="System.Reactive.Windows.Threading" Version="3.1.0" />
   </ItemGroup>
 </Project>

packages.cake

@@ -281,11 +281,10 @@ public class Packages
             new NuGetPackSettings()
             {
                 Id = "Avalonia.ReactiveUI",
-                Dependencies = new []
+                Dependencies = new DependencyBuilder(this)
                 {
                     new NuSpecDependency() { Id = "Avalonia", Version = parameters.Version },
-                    new NuSpecDependency() { Id = "reactiveui", Version = ReactiveUIVersion }
-                },
+                }.Deps(new string[] {null}, "reactiveui"),
                 Files = new []
                 {
                     new NuSpecContent { Source = "Avalonia.ReactiveUI.dll", Target = "lib/netstandard1.3" }