diff --git a/.github/update_distribution.sh b/.github/update_distribution.sh
index d93acea74..d5472e2d2 100755
--- a/.github/update_distribution.sh
+++ b/.github/update_distribution.sh
@@ -422,8 +422,8 @@ install_shadow_masks() {
 
     echo "Installing Shadow Masks ${4}"
 
-    for file in $(ls "${TMP_FOLDER}" | grep .txt) ; do
-        copy_file "${TMP_FOLDER}/${file}" "${TARGET_DIR}/Shadow_Masks/${file}"
+    for file in $(find "${TMP_FOLDER}" -iname '*.txt' -print) ; do
+        copy_file "${file}" "${TARGET_DIR}/Shadow_Masks/${file}"
     done
 }