diff --git a/bin/splitter.js b/bin/splitter.js
index ab65c2d..ad3a2a4 100644
--- a/bin/splitter.js
+++ b/bin/splitter.js
@@ -70,7 +70,7 @@ try {
   }
 
   files["base"] = cssUnixEndings.match(
-    /\/\* BASE THEME START\*\/(.*?)\/\* BASE THEME END \*\//gs
+    /\/\* BASE THEME START\*\/(.*?)\/\* BASE THEME END \*\//s
   )[1];
 
   for (const key of Object.keys(parsed.metadata.vars)) {