diff --git a/build-config/rollup.config.js b/build-config/rollup.config.js
index cda3562..589bab0 100644
--- a/build-config/rollup.config.js
+++ b/build-config/rollup.config.js
@@ -35,8 +35,10 @@ export default {
     resolve(),
     commonjs(),
     sass({
-      output: true,
+      // output: true is broken, c.f. differui/rollup-plugin-sass#42
+      output: './marking-menu.css',
       options: {
+        // FIXME: SourceMap not working, c.f. differui/rollup-plugin-sass#37
         sourceMap: true,
         functions: sassTrigo
       }