diff --git a/README.md b/README.md
index 4f545b3c..9f16972a 100644
--- a/README.md
+++ b/README.md
@@ -83,7 +83,7 @@ from inside the frappe-docker repo:
 
 <!-- Setup reference to our own repo -->
 
-`APPS_JSON_BASE64=$(echo ${APPS_JSON} | base64 -w 0)`
+`APPS_JSON_BASE64=$(base64 -w 0 ./apps.json)`
 
 <!-- build the docker image -->