diff --git a/lib/build.js b/lib/build.js
index c933f79..d7946d3 100644
--- a/lib/build.js
+++ b/lib/build.js
@@ -56,6 +56,7 @@ module.exports = function(opts) {
 	, outDir = out.replace(/[^\/]+$/, "")
 	, ext = getExt(out)
 
+	cli.mkdirp(outDir)
 	readHashes(outDir)
 
 	if (ext === "js") {