diff --git a/packages/producer/build.mjs b/packages/producer/build.mjs
index 2f497a6bd..8d1bcfede 100644
--- a/packages/producer/build.mjs
+++ b/packages/producer/build.mjs
@@ -36,7 +36,7 @@ await Promise.all([
     platform: "node",
     target: "node22",
     format: "esm",
-    external: ["puppeteer", "esbuild"],
+    external: ["puppeteer", "esbuild", "postcss"],
     plugins: [workspaceAliasPlugin],
     minify: false,
     sourcemap: true,
@@ -48,7 +48,7 @@ await Promise.all([
     platform: "node",
     target: "node22",
     format: "esm",
-    external: ["puppeteer", "esbuild"],
+    external: ["puppeteer", "esbuild", "postcss"],
     plugins: [workspaceAliasPlugin],
     minify: false,
     sourcemap: true,