diff --git a/index.mjs b/index.mjs
index 4bf045c..1c4665e 100644
--- a/index.mjs
+++ b/index.mjs
@@ -39,7 +39,7 @@ export function createConfig (manifestPathRelative, options, createConfig) {
 
 	function getOutputFilename (entryPath, ext) {
 		const base = relative(manifestDirname, dirname(entryPath));
-		return join(base, `${uniqueFileNameSegment(entryPath, ext)}`);
+		return join(base, uniqueFileNameSegment(entryPath, ext));
 	}
 
 	function getOutputPathRelative (outputDir, platform, entryPath, ext) {