diff --git a/build-userscript.sh b/build-userscript.sh
new file mode 100755
index 0000000..dc8cb0c
--- /dev/null
+++ b/build-userscript.sh
@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+OUT="build/aocc.user.js"
+
+rm -rf build
+mkdir build
+touch $OUT
+
+echo '// ==UserScript==' >> "$OUT"
+echo '// @name        Advent of Code Charts' >> "$OUT"
+echo '// @namespace   https://github.com/Bogdanp/awesome-advent-of-code' >> "$OUT"
+echo '// @match       https://adventofcode.com/*/leaderboard/private/view/*' >> "$OUT"
+echo '// @homepageURL https://github.com/Bogdanp/awesome-advent-of-code' >> "$OUT"
+echo '// @run-at      document-end' >> "$OUT"
+echo '// ==/UserScript==' >> "$OUT"
+echo '' >> "$OUT"
+
+cat node_modules/moment/min/moment.min.js >> "$OUT"
+echo '' >> "$OUT"
+cat node_modules/chart.js/dist/chart.umd.js >> "$OUT"
+cat node_modules/chartjs-adapter-moment/dist/chartjs-adapter-moment.min.js >> "$OUT"
+cat src/js/app.js >> "$OUT"
+
+echo 'const style = document.createElement("style");' >> "$OUT"
+echo 'style.textContent = `' >> "$OUT"
+cat src/css/app.css >> "$OUT"
+echo '`;' >> "$OUT"
+echo 'document.head.appendChild(style);' >> "$OUT"