diff --git a/gulpfile.js b/gulpfile.legacy.js
similarity index 96%
rename from gulpfile.js
rename to gulpfile.legacy.js
index db1c882537..53897cda7c 100644
--- a/gulpfile.js
+++ b/gulpfile.legacy.js
@@ -1,3 +1,6 @@
+// Legacy gulpfile (non-functional)
+// Retained for reference only — use gulpfile.mjs instead.
+
 /*
   global
 
diff --git a/gulpfile.mjs b/gulpfile.mjs
index 8acbad57ad..2f7ba456a7 100644
--- a/gulpfile.mjs
+++ b/gulpfile.mjs
@@ -24,7 +24,7 @@ const paths = {
         dest: "dist/css"
     },
     sass: {
-        src: "scss/**/*.scss",
+        src: "css/**/*.sass",
         dest: "dist/css"
     }
 };
diff --git a/package.json b/package.json
index ff04b841c5..b7c413bff5 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,7 @@
     "gulp-babel": "^8.0.0",
     "gulp-clean-css": "^4.3.0",
     "gulp-prettier": "^3.0.0",
+    "gulp-rename": "^2.0.0",
     "gulp-uglify": "^3.0.2",
     "jest": "^29.7.0",
     "jest-environment-jsdom": "^29.7.0",