diff --git a/build/build.js b/build/build.js
index eb03b80ed..c8b9ab545 100644
--- a/build/build.js
+++ b/build/build.js
@@ -1,12 +1,12 @@
+import path from 'path';
+import { promises as fs } from 'fs';
 import * as rollup from 'rollup';
 import commonjs from '@rollup/plugin-commonjs';
 import nodeResolve from '@rollup/plugin-node-resolve';
 import uglify from '@rollup/plugin-terser';
 import replace from '@rollup/plugin-replace';
 import chokidar from 'chokidar';
-import path from 'path';
 import { relative } from './util.js';
-import { promises as fs } from 'fs';
 
 const pkgPath = relative(import.meta, '..', 'package.json');
 const pkgString = (await fs.readFile(pkgPath)).toString();
diff --git a/build/cover.js b/build/cover.js
index 9d64aebed..64bf5a70f 100644
--- a/build/cover.js
+++ b/build/cover.js
@@ -1,5 +1,6 @@
 import fs from 'fs';
 import { relative } from './util.js';
+
 const read = fs.readFileSync;
 const write = fs.writeFileSync;
 const pkgPath = relative(import.meta, '..', 'package.json');
diff --git a/build/emoji.js b/build/emoji.js
index 0dc41dc3b..f1ad8930b 100644
--- a/build/emoji.js
+++ b/build/emoji.js
@@ -1,6 +1,6 @@
-import axios from 'axios';
 import fs from 'fs';
 import path from 'path';
+import axios from 'axios';
 
 const filePaths = {
   emojiMarkdown: path.resolve(process.cwd(), 'docs', 'emoji.md'),
diff --git a/build/mincss.js b/build/mincss.js
index 3e4206066..3d480c1d8 100644
--- a/build/mincss.js
+++ b/build/mincss.js
@@ -1,14 +1,17 @@
-import cssnano from 'cssnano';
 import path from 'path';
 import fs from 'fs';
+import cssnano from 'cssnano';
 
-const files = fs.readdirSync(path.resolve('lib/themes'));
+const files = fs
+  .readdirSync(path.resolve('lib/themes'))
+  .filter(file => !file.endsWith('min.css'));
 
 files.forEach(file => {
   file = path.resolve('lib/themes', file);
   cssnano
     .process(fs.readFileSync(file))
     .then(result => {
+      file = file.replace(/\.css$/, '.min.css');
       fs.writeFileSync(file, result.css);
     })
     .catch(e => {
diff --git a/docs/_media/example.js b/docs/_media/example.js
index 33bdf862c..0d30c252f 100644
--- a/docs/_media/example.js
+++ b/docs/_media/example.js
@@ -3,7 +3,7 @@ import fetch from 'fetch';
 const URL = 'https://example.com';
 const PORT = 8080;
 
-/// [demo]
+// / [demo]
 const result = fetch(`${URL}:${PORT}`)
   .then(response => {
     return response.json();
@@ -11,6 +11,6 @@ const result = fetch(`${URL}:${PORT}`)
   .then(myJson => {
     console.log(JSON.stringify(myJson));
   });
-/// [demo]
+// / [demo]
 
 result.then(console.log).catch(console.error);