diff --git a/upstreams.sh b/upstreams.sh
index fea0ba06..7625e056 100755
--- a/upstreams.sh
+++ b/upstreams.sh
@@ -93,9 +93,9 @@ for part in "${parts[@]}"; do
 		[ -f "$input_file" ] || input_file="$BASEPATH/default.cfg"
 
 		# Run envsubst to replace environment variables in the input file and save the result to the output file
-		if yaml2json < tron-mainnet.yml | jq -e '.upstreams' >/dev/null 2>&1; then
+		if yaml2json < "$BASEPATH/$part" | jq -e '.upstreams' >/dev/null 2>&1; then
 		    echo "upstreams key exists in $part"
-		    upstreams+=($(yaml2json < tron-mainnet.yml | jq '.upstreams' | sed 's/^/  /' | envsubst | json2yaml))
+		    upstreams+=($(yaml2json < "$BASEPATH/$part" | jq '.upstreams' | sed 's/^/  /' | envsubst | json2yaml))
 		else
 		    echo "upstreams config $input_file for $part"
 		    upstreams+=("$(envsubst < "$input_file")")