diff --git a/package.json b/package.json
index 16c3f11..0f22038 100644
--- a/package.json
+++ b/package.json
@@ -5,10 +5,10 @@
   "main": "n/a",
   "scripts": {
     "develop": "gatsby develop",
-    "build": "npm run clean & gatsby build & copy",
+    "build": "gatsby build",
     "clean:public": "rm -rf public",
     "clean": "npm run clean:public",
-    "copy:files": "cp pages/*.{pdf,txt,png,jpg,jpeg,gif} public/",
+    "copy:files": "find ./pages -maxdepth 1 -type f -regextype posix-extended -regex '.+\\.(pdf|txt|png|jpg|jpeg|gif)$' -exec cp -v {} ./public ';'",
     "copy": "npm run copy:files",
     "lint": "./node_modules/.bin/eslint --ext .js,.jsx --ignore-pattern public .",
     "test": "echo \"Error: no test specified\" && exit 1",