Attempt to fix Jenkins issue

Change-Id: Ife84a228b36c51bfabc2f806f15dc05bdeed86b6
diff --git a/web/gui/onos-gui-build b/web/gui/onos-gui-build
index b0bb79f..0b43815 100755
--- a/web/gui/onos-gui-build
+++ b/web/gui/onos-gui-build
@@ -10,6 +10,7 @@
 cd $ONOS_ROOT/tools/gui
 
 # Ensure lock file is removed
+rm -rf node_modules
 rm -f package-lock.json
 
 # Install Project Dependencies
@@ -19,4 +20,4 @@
 
 # Build the GUI Project
 echo "Packaging JavaScript and CSS"
-npm run build
\ No newline at end of file
+npm run build