diff --git a/scripts/custom-docker-build b/scripts/custom-docker-build
index e67c753..12245d7 100755
--- a/scripts/custom-docker-build
+++ b/scripts/custom-docker-build
@@ -211,9 +211,6 @@ function print_pgbouncer_args() {
 function print_ruby_args() {
     case "$1" in
         2.6|2.6.*)
-            # 2.6 requires older version of debian
-            CUSTOM_IMAGE_NAME=debian
-            CUSTOM_IMAGE_VERSION=stretch
             RUBY_VERSION="2.6.6"
             RUBY_DOWNLOAD_SHA256="364b143def360bac1b74eb56ed60b1a0dca6439b00157ae11ff77d5cd2e92291"
             ;;