diff --git a/derive.sh b/derive.sh
index ae7e5a7..d95113c 100755
--- a/derive.sh
+++ b/derive.sh
@@ -5,7 +5,7 @@
 # License: GPL-3.0+
 
 SUITE=$1
-BASE_IMAGE=$CI_REGISTRY_IMAGE:$SUITE
+BASE_IMAGE=$CI_REGISTRY_IMAGE/slim:$SUITE
 
 IMAGE=$CI_REGISTRY_IMAGE/builder
 STAMP=$(date +%F)