diff --git a/build/SharedFx.targets b/build/SharedFx.targets
index 22bb61ab71..a947def3bd 100644
--- a/build/SharedFx.targets
+++ b/build/SharedFx.targets
@@ -65,11 +65,11 @@
     <MSBuild Projects="@(FxProjectToBuild)"
              Properties="$(SharedFxBuildProperties)"
              BuildInParallel="true" />
-
+    <!-- BuildInParallel="false" because dotnet store runs during site extension build and is failing if packages are being currently generated -->
     <MSBuild Projects="@(FxProjectToBuild)"
              Targets="Pack"
              Properties="$(SharedFxBuildProperties);NoBuild=true"
-             BuildInParallel="true"
+             BuildInParallel="false"
              SkipNonexistentTargets="true" />
   </Target>