diff --git a/qt6-after/qt6-migrated-legatus/new_docker_build.sh b/qt6-after/qt6-migrated-legatus/new_docker_build.sh
index 04df933f8..1d664ec90 100755
--- a/qt6-after/qt6-migrated-legatus/new_docker_build.sh
+++ b/qt6-after/qt6-migrated-legatus/new_docker_build.sh
@@ -518,6 +518,27 @@ GROUP3_TARGETS=(
   whgTests
 )
 
+# Release build targets: Z components only (no Lts/Services)
+# Used when RELEASE_BUILD=ON to build only release scope modules
+RELEASE_GROUP3_TARGETS=(
+  NGLLogger
+  nglapplication
+  nglcompression
+  nglcoreapplication
+  ngldb
+  nglguiapplication
+  nglsettings
+  nglsingleapplication
+  nglsinglecoreapplication
+  ngltools
+  ngltranslator
+  nglwidgets
+  qtsingleapplication
+  qtsinglecoreapplication
+  wms_json_ds
+  tcpserver
+)
+
 GROUP4_TARGETS=(
   # DDS tests
   ddsGenericDataTests
@@ -1140,7 +1161,12 @@ fi
 
 GROUP1_TARGETS_STRING="$(join_by ' ' "${GROUP1_TARGETS[@]}")"
 GROUP2_TARGETS_STRING="$(join_by ' ' "${GROUP2_TARGETS[@]}")"
-GROUP3_TARGETS_STRING="$(join_by ' ' "${GROUP3_TARGETS[@]}")"
+# Use release-specific targets when RELEASE_BUILD=ON
+if [[ "${RELEASE_BUILD}" == "ON" ]]; then
+  GROUP3_TARGETS_STRING="$(join_by ' ' "${RELEASE_GROUP3_TARGETS[@]}")"
+else
+  GROUP3_TARGETS_STRING="$(join_by ' ' "${GROUP3_TARGETS[@]}")"
+fi
 GROUP4_TARGETS_STRING="$(join_by ' ' "${GROUP4_TARGETS[@]}")"
 GROUP5_TARGETS_STRING="$(join_by ' ' "${GROUP5_TARGETS[@]}")"
 GROUP6_TARGETS_STRING="$(join_by ' ' "${GROUP6_TARGETS[@]}")"