diff --git a/extensions/css-language-features/server/extension.webpack.config.js b/extensions/css-language-features/server/extension.webpack.config.js
index f89cb636f3879adf29a9e04703f9f387a81d7577..6b2727c1074217df70d24f4845d460ded6bb5f57 100644
--- a/extensions/css-language-features/server/extension.webpack.config.js
+++ b/extensions/css-language-features/server/extension.webpack.config.js
@@ -30,7 +30,7 @@ module.exports = withDefaults({
 	},
 	plugins: [
 		new webpack.NormalModuleReplacementPlugin(
-			/\/vscode-languageserver\/lib\/files\.js/,
+			/\/|\\vscode-languageserver\/|\\lib\/|\\files\.js/,
 			require.resolve('./build/filesFillIn')
 		),
 		new webpack.IgnorePlugin(/vertx/)
diff --git a/extensions/html-language-features/server/extension.webpack.config.js b/extensions/html-language-features/server/extension.webpack.config.js
index e6c50b131db38e3a36ba84e36346afdf2f2d80fc..675a7ff7c2eaf99df9380eee9b9defd2d54dce82 100644
--- a/extensions/html-language-features/server/extension.webpack.config.js
+++ b/extensions/html-language-features/server/extension.webpack.config.js
@@ -34,7 +34,7 @@ module.exports = withDefaults({
 	},
 	plugins: [
 		new webpack.NormalModuleReplacementPlugin(
-			/\/vscode-languageserver\/lib\/files\.js/,
+			/\/|\\vscode-languageserver\/|\\lib\/|\\files\.js/,
 			require.resolve('./build/filesFillIn')
 		),
 		new webpack.IgnorePlugin(/vertx/)
diff --git a/extensions/json-language-features/server/build/files.js b/extensions/json-language-features/server/build/filesFillIn.js
similarity index 100%
rename from extensions/json-language-features/server/build/files.js
rename to extensions/json-language-features/server/build/filesFillIn.js
diff --git a/extensions/json-language-features/server/extension.webpack.config.js b/extensions/json-language-features/server/extension.webpack.config.js
index 23d653ecb513e0168a3fc5e5808b156c20a7fc38..c844481d338bf37adb50c3698d6813daf5d95296 100644
--- a/extensions/json-language-features/server/extension.webpack.config.js
+++ b/extensions/json-language-features/server/extension.webpack.config.js
@@ -31,7 +31,7 @@ module.exports = withDefaults({
 	plugins: [
 		new webpack.NormalModuleReplacementPlugin(
 			/\/|\\vscode-languageserver\/|\\lib\/|\\files\.js/,
-			require.resolve('./build/files')
+			require.resolve('./build/filesFillIn')
 		),
 		new webpack.IgnorePlugin(/vertx/)
 	],