diff --git a/packages/vite/src/node/importGlob.ts b/packages/vite/src/node/importGlob.ts
index 29fbca7569cc6c..57a20f85aa8b5b 100644
--- a/packages/vite/src/node/importGlob.ts
+++ b/packages/vite/src/node/importGlob.ts
@@ -15,7 +15,7 @@ export async function transformImportGlob(
   importIndex: number,
   root: string,
   normalizeUrl?: (url: string, pos: number) => Promise<[string, string]>,
-  ssr = false
+  preload = true
 ): Promise<{
   importsString: string
   imports: string[]
@@ -87,7 +87,7 @@ export async function transformImportGlob(
       entries += ` ${JSON.stringify(file)}: ${identifier},`
     } else {
       let imp = `import(${JSON.stringify(importee)})`
-      if (!normalizeUrl && !ssr) {
+      if (!normalizeUrl && preload) {
         imp =
           `(${isModernFlag}` +
           `? ${preloadMethod}(()=>${imp},"${preloadMarker}")` +
diff --git a/packages/vite/src/node/plugins/importAnalysisBuild.ts b/packages/vite/src/node/plugins/importAnalysisBuild.ts
index a8907ecbea2368..5674e6327836b9 100644
--- a/packages/vite/src/node/plugins/importAnalysisBuild.ts
+++ b/packages/vite/src/node/plugins/importAnalysisBuild.ts
@@ -82,6 +82,7 @@ function preload(baseModule: () => Promise<{}>, deps?: string[]) {
  */
 export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
   const ssr = !!config.build.ssr
+  const insertPreload = !(ssr || !!config.build.lib)
 
   return {
     name: 'vite:import-analysis',
@@ -145,7 +146,7 @@ export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
               index,
               config.root,
               undefined,
-              ssr
+              insertPreload
             )
           str().prepend(importsString)
           str().overwrite(expStart, endIndex, exp)
@@ -155,7 +156,7 @@ export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
           continue
         }
 
-        if (dynamicIndex > -1 && !ssr) {
+        if (dynamicIndex > -1 && insertPreload) {
           needPreloadHelper = true
           const dynamicEnd = source.indexOf(`)`, end) + 1
           const original = source.slice(dynamicIndex, dynamicEnd)
@@ -166,7 +167,7 @@ export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
 
       if (
         needPreloadHelper &&
-        !ssr &&
+        insertPreload &&
         !source.includes(`const ${preloadMethod} =`)
       ) {
         str().prepend(`import { ${preloadMethod} } from "${preloadHelperId}";`)