diff --git a/csharp/Mac/CustomBuildAction.targets b/csharp/Mac/CustomBuildAction.targets
index e20e70b8..2ac58ff0 100644
--- a/csharp/Mac/CustomBuildAction.targets
+++ b/csharp/Mac/CustomBuildAction.targets
@@ -1,9 +1,13 @@
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
     <PropertyGroup>
-        <CompileDependsOn>CopyInNativeLib;$(CompileDependsOn)</CompileDependsOn>
+        <CompileDependsOn>Buck;CopyInNativeLib;$(CompileDependsOn)</CompileDependsOn>
     </PropertyGroup>
 
+    <Target Name="Buck">
+        <Exec WorkingDirectory="$(OutDir)" Command="buck build //csharp:yoganet#default,shared" />
+    </Target>
+
     <!-- The # and , in this path does not play nice with the binding project logic, so make a copy -->
     <Target Name="CopyInNativeLib" Inputs="..\..\buck-out\gen\csharp\yoganet#default,shared\libyoga.dylib" Outputs="$(ProjectDir)libyoga.dylib">
         <Copy SourceFiles="..\..\buck-out\gen\csharp\yoganet#default,shared\libyoga.dylib" DestinationFiles="$(ProjectDir)/libyoga.dylib" />
diff --git a/csharp/iOS/Facebook.Yoga.iOS/CustomBuildAction.targets b/csharp/iOS/Facebook.Yoga.iOS/CustomBuildAction.targets
index 2d5538bd..06e8be25 100644
--- a/csharp/iOS/Facebook.Yoga.iOS/CustomBuildAction.targets
+++ b/csharp/iOS/Facebook.Yoga.iOS/CustomBuildAction.targets
@@ -1,8 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 	<PropertyGroup>
-		<CompileDependsOn>CopyInNativeLib;$(CompileDependsOn)</CompileDependsOn>
+		<CompileDependsOn>Buck;CopyInNativeLib;$(CompileDependsOn)</CompileDependsOn>
 	</PropertyGroup>
+	<Target Name="Buck">
+		<Exec WorkingDirectory="$(OutDir)" Command="buck build //csharp:yoganet-ios" />
+	</Target>
 	<!-- The # and , in this path does not play nice with the binding project logic, so make a copy -->
 	<Target Name="CopyInNativeLib" Inputs="..\..\..\buck-out\gen\csharp\yoganet-ios\libyoga.a" Outputs="$(ProjectDir)libyoga.a">
 		<Copy SourceFiles="..\..\..\buck-out\gen\csharp\yoganet-ios\libyoga.a" DestinationFiles="$(ProjectDir)/libyoga.a" />