diff --git a/scripts/gen_nvme.sh b/scripts/gen_nvme.sh
index 31817b271..fe619b2f3 100755
--- a/scripts/gen_nvme.sh
+++ b/scripts/gen_nvme.sh
@@ -34,10 +34,22 @@ function create_json_config() {
 	echo '}'
 }
 
+function create_json_config_with_subsystems() {
+	cat <<- JSON
+		{
+			"subsystems": [
+				$(create_json_config)
+			]
+		}
+	JSON
+}
+
 bdfs=($(nvme_in_userspace))
 
 if [ "$1" = "--json" ]; then
 	create_json_config
+elif [ "$1" = "--json-with-subsystems" ]; then
+	create_json_config_with_subsystems
 else
 	create_classic_config
 fi
diff --git a/scripts/vagrant/README.md b/scripts/vagrant/README.md
index 323a26d2d..ff77bfe47 100644
--- a/scripts/vagrant/README.md
+++ b/scripts/vagrant/README.md
@@ -184,7 +184,8 @@ Following VM initialization you must:
 
 ```
   $ sudo scripts/setup.sh
-  $ sudo ./build/examples/hello_bdev
+  $ sudo scripts/gen_nvme.sh --json-with-subsystems > ./build/examples/hello_bdev.json
+  $ sudo ./build/examples/hello_bdev --json ./build/examples/hello_bdev.json -b Nvme0n1
 ```
 
 ### Running autorun.sh with vagrant