diff --git a/packages/tsc/index.ts b/packages/tsc/index.ts
index ef04ee560c..759980b6ca 100644
--- a/packages/tsc/index.ts
+++ b/packages/tsc/index.ts
@@ -1,6 +1,5 @@
 import { runTsc } from '@volar/typescript/lib/quickstart/runTsc';
 import * as vue from '@vue/language-core';
-import * as path from 'path'
 
 const windowsPathReg = /\\/g;
 
@@ -17,11 +16,22 @@ export function run() {
 			const vueOptions = typeof configFilePath === 'string'
 				? vue.createParsedCommandLine(ts, ts.sys, configFilePath.replace(windowsPathReg, '/')).vueOptions
 				: vue.resolveVueCompilerOptions({});
-			let globalTypesBaseName: undefined | string;
 			const writeFile = options.host!.writeFile.bind(options.host);
+			const getCanonicalFileName = options.host?.useCaseSensitiveFileNames?.()
+				? (fileName: string) => fileName
+				: (fileName: string) => fileName.toLowerCase();
+			const canonicalRootFileNames = new Set(
+				options.rootNames
+					.map(rootName => rootName.replace(windowsPathReg, '/'))
+					.map(getCanonicalFileName)
+			);
+			const canonicalGlobalTypesHolderFileNames = new Set<string>();
 			options.host!.writeFile = (fileName, contents, ...args) => {
-				if (globalTypesBaseName && fileName.toLowerCase().endsWith(`${globalTypesBaseName}.d.ts`)) {
-					return writeFile(fileName, removeEmitGlobalTypes(contents), ...args);
+				if (
+					fileName.endsWith('.d.ts')
+					&& canonicalGlobalTypesHolderFileNames.has(getCanonicalFileName(fileName.replace(windowsPathReg, '/')).slice(0, -5))
+				) {
+					contents = removeEmitGlobalTypes(contents);
 				}
 				return writeFile(fileName, contents, ...args);
 			};
@@ -33,28 +43,12 @@ export function run() {
 					ts,
 					id => id,
 					fileName => {
-						const rootFileNames = options.rootNames.map(rootName => rootName.replace(windowsPathReg, '/'));
-						if (globalTypesBaseName) {
-							return globalTypesBaseName === path.basename(fileName).toLowerCase();
-						}
-
-						if (options.host?.useCaseSensitiveFileNames?.()) {
-							if (rootFileNames.includes(fileName)) {
-								globalTypesBaseName = path.basename(fileName).toLowerCase();
-								return true
-							};
-							return false;
-						}
-						else {
-							const lowerFileName = fileName.toLowerCase();
-							for (const rootFile of rootFileNames) {
-								if (rootFile.toLowerCase() === lowerFileName) {
-									globalTypesBaseName = path.basename(lowerFileName);
-									return true;
-								}
-							}
-							return false;
+						fileName = getCanonicalFileName(fileName);
+						canonicalGlobalTypesHolderFileNames.add(fileName);
+						if (canonicalRootFileNames.has(fileName)) {
+							return true;
 						}
+						return false;
 					},
 					options.options,
 					vueOptions,