diff --git a/env-example b/env-example
index 7347e051..0bf08ac3 100644
--- a/env-example
+++ b/env-example
@@ -166,7 +166,7 @@ WORKSPACE_INSTALL_SWOOLE=false
 WORKSPACE_INSTALL_TAINT=false
 WORKSPACE_INSTALL_LIBPNG=false
 WORKSPACE_INSTALL_GRAPHVIZ=false
-WORKSPACE_INSTALL_IONCUBE=false
+WORKSPACE_INSTALL_IONCUBE=false # PHP 8.0 is not supported yet. Reference: https://forum.ioncube.com/viewtopic.php?t=4592
 WORKSPACE_INSTALL_MYSQL_CLIENT=false
 WORKSPACE_INSTALL_PING=false
 WORKSPACE_INSTALL_SSHPASS=false
@@ -240,7 +240,7 @@ PHP_FPM_INSTALL_POSTGIS=false
 PHP_FPM_INSTALL_PCNTL=false
 PHP_FPM_INSTALL_CALENDAR=false
 PHP_FPM_INSTALL_FAKETIME=false
-PHP_FPM_INSTALL_IONCUBE=false
+PHP_FPM_INSTALL_IONCUBE=false # PHP 8.0 is not supported yet. Reference: https://forum.ioncube.com/viewtopic.php?t=4592
 PHP_FPM_INSTALL_RDKAFKA=false
 PHP_FPM_INSTALL_GETTEXT=false
 PHP_FPM_INSTALL_XMLRPC=false