diff --git a/scripts/build/bundler.mjs b/scripts/build/bundler.mjs
index 35c57d38d..b38e7e98d 100644
--- a/scripts/build/bundler.mjs
+++ b/scripts/build/bundler.mjs
@@ -190,11 +190,13 @@ async function* getEsbuildOptions(bundle, buildOptions) {
       format: "umd",
     };
 
-    yield {
-      ...esbuildOptions,
-      outfile: `esm/${bundle.output.replace(".js", ".mjs")}`,
-      format: "esm",
-    };
+    if (/^(?:standalone|parser-.*)\.js$/.test(bundle.output)) {
+      yield {
+        ...esbuildOptions,
+        outfile: `esm/${bundle.output.replace(".js", ".mjs")}`,
+        format: "esm",
+      };
+    }
   } else {
     esbuildOptions.external.push(
       ...builtinModules,
diff --git a/scripts/build/config.mjs b/scripts/build/config.mjs
index 4851adfff..217f4f46d 100644
--- a/scripts/build/config.mjs
+++ b/scripts/build/config.mjs
@@ -111,8 +111,6 @@ const parsers = [
   },
   {
     input: "src/language-css/parser-postcss.js",
-    // postcss has dependency cycles that don't work with rollup
-    bundler: "webpack",
     replace: {
       // `postcss-values-parser` uses constructor.name, it will be changed by rollup or terser
       // https://github.com/shellscape/postcss-values-parser/blob/c00f858ab8c86ce9f06fdb702e8f26376f467248/lib/parser.js#L499