diff --git a/netbeans.apache.org/src/content/download/dev/index.asciidoc b/netbeans.apache.org/src/content/download/dev/index.asciidoc
index 8648b0c..050315d 100644
--- a/netbeans.apache.org/src/content/download/dev/index.asciidoc
+++ b/netbeans.apache.org/src/content/download/dev/index.asciidoc
@@ -39,6 +39,7 @@
 . Clone the https://github.com/apache/netbeans GitHub repository.
 . Install Oracle's Java or Open JDK (v8, v11).
 . Install Apache Ant 1.10 or greater (https://ant.apache.org/).
+. Set JAVA_HOME and ANT_HOME appropriately or leave them undefined.
 
 Once you're all set just enter the `netbeans` directory and type: