diff --git a/scripts/dockerrun.sh b/scripts/dockerrun.sh
index 15a81ef15..1b96a5021 100755
--- a/scripts/dockerrun.sh
+++ b/scripts/dockerrun.sh
@@ -139,5 +139,6 @@ docker run $INTERACTIVE -t --rm --sig-proxy=true \
     -e PB_ASSETROOTURL \
     -e PB_PACKAGEVERSIONPROPSURL \
     -e PB_PUBLISHBLOBFEEDURL \
+    -e EXTERNALRESTORESOURCES \
     $DOTNET_BUILD_CONTAINER_TAG \
     $BUILD_COMMAND "$@"