diff --git a/build/linux/snap/1_build-deps-snapcraft.sh b/build/linux/snap/1_build-deps-snapcraft.sh
index 8d9ac16352..2391040a27 100644
--- a/build/linux/snap/1_build-deps-snapcraft.sh
+++ b/build/linux/snap/1_build-deps-snapcraft.sh
@@ -57,6 +57,7 @@ printf "\e[0Ksection_end:`date +%s`:deps_install\r\e[0K\n"
 
 printf "\e[0Ksection_start:`date +%s`:babl_build[collapsed=true]\r\e[0KBuilding babl\n"
 if [ "$CI_COMMIT_TAG" ] && grep 'grade: devel' build/linux/snap/snapcraft.yaml >/dev/null 2>&1; then
+  #see: https://developer.gimp.org/core/maintainer/release/
   printf '\033[31m(ERROR)\033[0m: non-tagged babl and GEGL source should not be used on CI_COMMIT_TAG pipelines. Please, change grade value to stable on snapcraft.yaml\n'
   exit 1
 fi