diff --git a/eng/SourceBuild.props b/eng/SourceBuild.props
index 9ebca97ff..5f49a5688 100644
--- a/eng/SourceBuild.props
+++ b/eng/SourceBuild.props
@@ -3,6 +3,7 @@
   <PropertyGroup>
     <GitHubRepositoryName>installer</GitHubRepositoryName>
     <SourceBuildManagedOnly>true</SourceBuildManagedOnly>
+    <SourceBuildTrimNetFrameworkTargets>true</SourceBuildTrimNetFrameworkTargets>
   </PropertyGroup>
 
   <Target Name="ConfigureInnerBuildArg" BeforeTargets="GetSourceBuildCommandConfiguration">