diff --git a/src/SourceBuild/content/repo-projects/Directory.Build.props b/src/SourceBuild/content/repo-projects/Directory.Build.props
index b48b56ebe..4e88cebd4 100644
--- a/src/SourceBuild/content/repo-projects/Directory.Build.props
+++ b/src/SourceBuild/content/repo-projects/Directory.Build.props
@@ -56,8 +56,12 @@
     <BuildArgs>$(BuildArgs) $(FlagParameterPrefix)configuration $(Configuration)</BuildArgs>
     <BuildArgs>$(BuildArgs) -bl</BuildArgs>
     <BuildArgs>$(BuildArgs) /p:CopySrcInsteadOfClone=true</BuildArgs>
+    <BuildArgs>$(BuildArgs) /p:DotNetBuildRepo=true</BuildArgs>
     <BuildArgs Condition="'$(CrossBuild)' == 'true'">$(BuildArgs) /p:CrossBuild=$(CrossBuild)</BuildArgs>
-    <BuildArgs Condition="'$(DotNetBuildVertical)' == 'true'">$(BuildArgs) /p:ArcadeBuildVertical=true</BuildArgs>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(DotNetBuildVertical)' == 'true'">
+    <BuildArgs>$(BuildArgs) /p:ArcadeBuildVertical=true</BuildArgs>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(DotNetBuildFromSource)' == 'true'">