diff --git a/packages/docusaurus-types/src/index.d.ts b/packages/docusaurus-types/src/index.d.ts
index 0a875e78e7de..a6cb0b00b483 100644
--- a/packages/docusaurus-types/src/index.d.ts
+++ b/packages/docusaurus-types/src/index.d.ts
@@ -67,7 +67,6 @@ export {
   Validate,
   ValidationSchema,
   AllContent,
-  PostBuildProps,
   RouteBuildMetadata,
   ConfigureWebpackUtils,
   PostCssOptions,
diff --git a/packages/docusaurus-types/src/plugin.d.ts b/packages/docusaurus-types/src/plugin.d.ts
index 9c4f14514557..4a7dceaa23bd 100644
--- a/packages/docusaurus-types/src/plugin.d.ts
+++ b/packages/docusaurus-types/src/plugin.d.ts
@@ -119,7 +119,7 @@ export type RouteBuildMetadata = {
   // For now the only need is our sitemap plugin to filter noindex pages
   noIndex: boolean;
 };
-export type PostBuildProps = Props & {
+export type PostBuildProps<Content> = Props & {
   content: Content;
 
   // TODO Docusaurus v4: remove old messy unserializable "head" API
@@ -141,7 +141,16 @@ export type Plugin<Content = unknown> = {
     allContent: AllContent;
     actions: PluginContentLoadedActions;
   }) => Promise<void> | void;
-  postBuild?: (props: PostBuildProps) => Promise<void> | void;
+  postBuild?: (
+    props: Props & {
+      content: Content;
+      // TODO Docusaurus v4: remove old messy unserializable "head" API
+      //  breaking change, replaced by routesBuildMetadata
+      //  Reason: https://github.com/facebook/docusaurus/pull/10826
+      head: {[location: string]: HelmetServerState};
+      routesBuildMetadata: {[location: string]: RouteBuildMetadata};
+    },
+  ) => Promise<void> | void;
   // TODO Docusaurus v4 ?
   //  refactor the configureWebpack API surface: use an object instead of
   //  multiple params (requires breaking change)
diff --git a/packages/docusaurus/src/commands/build/buildLocale.ts b/packages/docusaurus/src/commands/build/buildLocale.ts
index 05bb095e0581..1e1a2a61bb05 100644
--- a/packages/docusaurus/src/commands/build/buildLocale.ts
+++ b/packages/docusaurus/src/commands/build/buildLocale.ts
@@ -23,7 +23,6 @@ import type {
   ConfigureWebpackUtils,
   LoadedPlugin,
   Props,
-  PostBuildProps,
 } from '@docusaurus/types';
 import type {SiteCollectedData} from '../../common';
 import {BuildCLIOptions} from './build';
@@ -139,15 +138,12 @@ async function executePluginsPostBuild({
       if (!plugin.postBuild) {
         return;
       }
-
-      const postBuildProps: PostBuildProps = {
+      await plugin.postBuild({
         ...props,
         head,
         routesBuildMetadata,
         content: plugin.content,
-      };
-
-      await plugin.postBuild(postBuildProps);
+      });
     }),
   );
 }