diff --git a/.github/scripts/clear-s3-caches.sh b/.github/scripts/clear-s3-caches.sh
index 9c44a72b2..4051526d8 100755
--- a/.github/scripts/clear-s3-caches.sh
+++ b/.github/scripts/clear-s3-caches.sh
@@ -18,24 +18,25 @@ s3_url=s3://dist.springsource.com/${s3_path}
 files=`aws s3 cp ${s3_url} . --recursive --include "*" --dryrun`
 counter=0
 json=""
+NL=$'\n'
 for file in $files
 do
   echo "Processing ${file}"
   if [[ "$counter" -eq 0 ]]; then
-    json="{\"files\": [$'\n'"
+    json="{\"files\": [${NL}"
   fi
   echo "Current json: ${json}"
   if [[ "$file" =~ ^"s3://dist.springsource.com" ]]; then
     echo "Is a file in s3 ${file}"
-    let "counter++"
+    counter=$((counter+1))
     echo "Counter ${counter}"
     path=${file:26}
     echo "Path ${path}"
-    json="${json}\"http://dist.springsource.com${path}\",$'\n'\"http://dist.springsource.com${path}\",$'\n'\"http://download.springsource.com${path}\",$'\n'\"https://download.springsource.com${path}\",$'\n'"
+    json="${json}\"http://dist.springsource.com${path}\",${NL}\"http://dist.springsource.com${path}\",${NL}\"http://download.springsource.com${path}\",${NL}\"https://download.springsource.com${path}\",${NL}"
   fi
   if [[ "$counter" -eq 10 ]]; then
     echo "Batch completed"
-    json="${json:-2}$'\n']}"
+    json="${json:-2}${NL}]}"
     echo $json
     json=""
   fi