diff --git a/src/core/options.ts b/src/core/options.ts
index 120c2702..21cb9701 100644
--- a/src/core/options.ts
+++ b/src/core/options.ts
@@ -53,12 +53,12 @@ export function resolveOptions(options: Options, root: string): ResolvedOptions
       throw new Error('[unplugin-vue-components] `extensions` option is required to search for components')
   }
 
-  resolved.dts = !options.dts
+  resolved.dts = !resolved.dts
     ? false
     : resolve(
       root,
-      typeof options.dts === 'string'
-        ? options.dts
+      typeof resolved.dts === 'string'
+        ? resolved.dts
         : 'components.d.ts',
     )
   resolved.root = root
diff --git a/src/core/unplugin.ts b/src/core/unplugin.ts
index 32365858..c4972ada 100644
--- a/src/core/unplugin.ts
+++ b/src/core/unplugin.ts
@@ -36,7 +36,7 @@ export default createUnplugin<Options>((options = {}) => {
     vite: {
       configResolved(config) {
         ctx.setRoot(config.root)
-        ctx.sourcemap = config.build.sourcemap
+        ctx.sourcemap = true
 
         if (config.plugins.find(i => i.name === 'vite-plugin-vue2'))
           ctx.setTransformer('vue2')