diff --git a/build/linux/flatpak/1_build-deps-flatpak.sh b/build/linux/flatpak/1_build-deps-flatpak.sh
index a4e09c2236..676c2b458c 100644
--- a/build/linux/flatpak/1_build-deps-flatpak.sh
+++ b/build/linux/flatpak/1_build-deps-flatpak.sh
@@ -31,13 +31,13 @@ if [ -z "$GITLAB_CI" ] && [ "$1" != '--ci' ]; then
     mkdir -p "$GIMP_PREFIX"
   fi
 
-  ## Clone and build deps
+  ## Clone and build deps (including babl and GEGL)
   flatpak-builder --force-clean --ccache --state-dir=../.flatpak-builder --keep-build-dirs --stop-at=gimp \
                   "$GIMP_PREFIX" build/linux/flatpak/org.gimp.GIMP-nightly.json 2>&1 | tee flatpak-builder.log
 
 
 elif [ "$GITLAB_CI" ] || [ "$1" = '--ci' ]; then
-  ## Prepare env
+  ## Prepare env (only GIMP_PREFIX is needed for flatpak)
   export GIMP_PREFIX="$PWD/_install"
 
   ## Clone and build deps (including babl and GEGL)
diff --git a/build/linux/flatpak/2_build-gimp-flatpak.sh b/build/linux/flatpak/2_build-gimp-flatpak.sh
index ccb4b78bb6..982d9f5914 100644
--- a/build/linux/flatpak/2_build-gimp-flatpak.sh
+++ b/build/linux/flatpak/2_build-gimp-flatpak.sh
@@ -49,7 +49,8 @@ elif [ "$GITLAB_CI" ] || [ "$1" = '--ci' ]; then
     tar cf gimp-meson-log.tar .flatpak-builder/build/gimp-1/_flatpak_build/meson-logs/meson-log.txt
   fi
 
-  ## Cleanup GIMP_PREFIX and export it to OSTree repo
+  ## Cleanup GIMP_PREFIX (not working) and export it to OSTree repo
+  ## https://github.com/flatpak/flatpak-builder/issues/14
   flatpak-builder --user --disable-rofiles-fuse --finish-only --repo=repo \
                   "$GIMP_PREFIX" build/linux/flatpak/org.gimp.GIMP-nightly.json
   if [ "$1" != '--ci' ]; then