diff --git a/src/node/plugin.ts b/src/node/plugin.ts
index a386fe2cf53c..033434e724e5 100644
--- a/src/node/plugin.ts
+++ b/src/node/plugin.ts
@@ -382,7 +382,12 @@ export async function createVitePressPlugin(
         )
 
         try {
-          await resolveUserConfig(siteConfig.root, 'serve', 'development')
+          await resolveUserConfig(
+            siteConfig.root,
+            'serve',
+            'development',
+            configPath ? path.relative(process.cwd(), configPath) : configPath
+          )
         } catch (err: any) {
           return
         }
diff --git a/src/node/server.ts b/src/node/server.ts
index dd3f6d8ae655..779cdfc00d29 100644
--- a/src/node/server.ts
+++ b/src/node/server.ts
@@ -13,7 +13,6 @@ export async function createServer(
     'development',
     serverOptions.configFile
   )
-  delete serverOptions.configFile
 
   if (serverOptions.base) {
     config.site.base = serverOptions.base