diff --git a/extensions/css-language-features/server/extension.webpack.config.js b/extensions/css-language-features/server/extension.webpack.config.js
index f89cb636f38..6b2727c1074 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 e6c50b131db..675a7ff7c2e 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 23d653ecb51..c844481d338 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/)
 	],