Build script creates required directories

build.js

@@ -217,6 +217,9 @@ async function addBabel(sourcePath, targetPath) {
 		}
 	}
 
+	const dirs = [...new Set(spec.map(item => path.dirname(item.target))).values()]
+	await Promise.all(dirs.map(d => fs.mkdir(pj(buildDir, d), {recursive: true})))
+
 	// Stage 2: Build
 	for (const item of spec) {
 		if (item.type === "file") {

package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "build": "node build.js",
     "watch": "fish -c 'while true; echo -n \"Build started at \"; date; npm run build; inotifywait (find src -type f) build.js -e close_write -qq; end'",
-    "rebuild": "find build -type f -exec rm {} \\; && node build.js"
+    "rebuild": "rm build -rf && node build.js"
   },
   "keywords": [],
   "author": "",