Only use export if not creating image

src/freedombone-utils-nodejs

@@ -287,8 +287,10 @@ function nodejs_setup_global_modules {
         echo "export NPM_CONFIG_PREFIX=/root/.npm-global" >> "$rootdir/root/.bashrc"
     fi
     # shellcheck disable=SC2086
-    $mesh_install_nodejs_prefix export PATH=/root/.npm-global/bin:$PATH
-    $mesh_install_nodejs_prefix export NPM_CONFIG_PREFIX=/root/.npm-global
+    if [ ! "$rootdir" ]; then
+        $mesh_install_nodejs_prefix export PATH=/root/.npm-global/bin:$PATH
+        $mesh_install_nodejs_prefix export NPM_CONFIG_PREFIX=/root/.npm-global
+    fi
 }
 
 function remove_nodejs {