diff --git a/packages/repl/.gitignore b/packages/repl/.gitignore
new file mode 100644
index 00000000..10dcd67f
--- /dev/null
+++ b/packages/repl/.gitignore
@@ -0,0 +1 @@
+stats.html
\ No newline at end of file
diff --git a/packages/repl/package.json b/packages/repl/package.json
index 08e3fbcf..c784ee6a 100644
--- a/packages/repl/package.json
+++ b/packages/repl/package.json
@@ -34,14 +34,15 @@
   "homepage": "https://github.com/tidalcycles/strudel#readme",
   "dependencies": {
     "@strudel.cycles/core": "workspace:*",
+    "@strudel.cycles/midi": "workspace:*",
     "@strudel.cycles/mini": "workspace:*",
+    "@strudel.cycles/soundfonts": "workspace:*",
     "@strudel.cycles/tonal": "workspace:*",
     "@strudel.cycles/transpiler": "workspace:*",
     "@strudel.cycles/webaudio": "workspace:*",
     "@strudel/codemirror": "workspace:*",
     "@strudel/hydra": "workspace:*",
-    "@strudel.cycles/soundfonts": "workspace:*",
-    "@strudel.cycles/midi": "workspace:*"
+    "rollup-plugin-visualizer": "^5.8.1"
   },
   "devDependencies": {
     "vite": "^4.3.3"
diff --git a/packages/repl/vite.config.js b/packages/repl/vite.config.js
new file mode 100644
index 00000000..4bb08a15
--- /dev/null
+++ b/packages/repl/vite.config.js
@@ -0,0 +1,20 @@
+import { defineConfig } from 'vite';
+import { dependencies } from './package.json';
+import { resolve } from 'path';
+// import { visualizer } from 'rollup-plugin-visualizer';
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [],
+  build: {
+    lib: {
+      entry: resolve(__dirname, 'index.mjs'),
+      formats: ['es', 'cjs'],
+      fileName: (ext) => ({ es: 'index.mjs', cjs: 'index.js' }[ext]),
+    },
+    rollupOptions: {
+      // external: [...Object.keys(dependencies)],
+    },
+    target: 'esnext',
+  },
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3fa26a48..d3161184 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -497,6 +497,9 @@ importers:
       '@strudel/hydra':
         specifier: workspace:*
         version: link:../hydra
+      rollup-plugin-visualizer:
+        specifier: ^5.8.1
+        version: 5.9.0
     devDependencies:
       vite:
         specifier: ^4.3.3
@@ -6271,7 +6274,6 @@ packages:
       string-width: 4.2.3
       strip-ansi: 6.0.1
       wrap-ansi: 7.0.0
-    dev: true
 
   /clone-buffer@1.0.0:
     resolution: {integrity: sha512-KLLTJWrvwIP+OPfMn0x2PheDEP20RPUcGXj/ERegTgdmPEZylALQldygiqrPPu8P45uNuPs7ckmReLY6v/iA5g==}
@@ -6776,7 +6778,6 @@ packages:
   /define-lazy-prop@2.0.0:
     resolution: {integrity: sha512-Ds09qNh8yw3khSjiJjiUInaGX9xlqZDY7JVryGxdxV7NPeuqQfplOpQ66yJFZut3jLa5zOwkXw1g9EI2uKh4Og==}
     engines: {node: '>=8'}
-    dev: true
 
   /define-properties@1.1.4:
     resolution: {integrity: sha512-uckOqKcfaVvtBdsVkdPv3XjveQJsNQqmhXgRi8uhvWWuPYZCNlzT8qAyblUgNoXdHdjMTzAqeGjAoli8f+bzPA==}
@@ -8040,7 +8041,6 @@ packages:
   /get-caller-file@2.0.5:
     resolution: {integrity: sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==}
     engines: {node: 6.* || 8.* || >= 10.*}
-    dev: true
 
   /get-func-name@2.0.0:
     resolution: {integrity: sha512-Hm0ixYtaSZ/V7C8FJrtZIuBBI+iSgL+1Aq82zSu8VQNB4S3Gk8e7Qs3VwBDJAhmRZcFqkl3tQu36g/Foh5I5ig==}
@@ -8935,7 +8935,6 @@ packages:
     resolution: {integrity: sha512-F+i2BKsFrH66iaUFc0woD8sLy8getkwTwtOBjvs56Cx4CgJDeKQeqfz8wAYiSb8JOprWhHH5p77PbmYCvvUuXQ==}
     engines: {node: '>=8'}
     hasBin: true
-    dev: true
 
   /is-docker@3.0.0:
     resolution: {integrity: sha512-eljcgEDlEns/7AXFosB5K/2nCM4P7FQPkGc/DWLy5rmFEWvZayGrik1d9/QIY5nJ4f9YsVvBkA6kJpHn9rISdQ==}
@@ -9162,7 +9161,6 @@ packages:
     engines: {node: '>=8'}
     dependencies:
       is-docker: 2.2.1
-    dev: true
 
   /is-wsl@3.1.0:
     resolution: {integrity: sha512-UcVfVfaK4Sc4m7X3dUSoHoozQGBEFeDC+zVo06t98xe8CzHSZZBekNXH+tu0NalHolcJ/QAGqS46Hef7QXBIMw==}
@@ -11296,7 +11294,6 @@ packages:
       define-lazy-prop: 2.0.0
       is-docker: 2.2.1
       is-wsl: 2.2.0
-    dev: true
 
   /optionator@0.8.3:
     resolution: {integrity: sha512-+IW9pACdk3XWmmTXG8m3upGUJst5XRGzxMRjXzAuJ1XnIFNvfhjjIuYkDvysnPQ7qzqVzLt78BCruntqRhWQbA==}
@@ -12562,7 +12559,6 @@ packages:
   /require-directory@2.1.1:
     resolution: {integrity: sha512-fGxEI7+wsG9xrvdjsrlmL22OMTTiHRwAMroiEeMgq8gzoLC/PQr7RsRDSTLUg/bZAZtF+TVIkHc6/4RIKrui+Q==}
     engines: {node: '>=0.10.0'}
-    dev: true
 
   /require-from-string@2.0.2:
     resolution: {integrity: sha512-Xf0nWe6RseziFMu+Ap9biiUbmplq6S9/p+7w7YXP/JBHhrUDDUhwa+vANyubuqfZWTveU//DYVGsDG7RKL/vEw==}
@@ -12734,7 +12730,6 @@ packages:
       picomatch: 2.3.1
       source-map: 0.7.4
       yargs: 17.6.2
-    dev: true
 
   /rollup@2.79.1:
     resolution: {integrity: sha512-uKxbd0IhMZOhjAiD5oAFp7BqvkA4Dv47qpOCtaNvng4HBwdbWtdOh8f5nZNuk2rp51PMGk3bzfWu5oayNEuYnw==}
@@ -14887,7 +14882,6 @@ packages:
       ansi-styles: 4.3.0
       string-width: 4.2.3
       strip-ansi: 6.0.1
-    dev: true
 
   /wrap-ansi@8.1.0:
     resolution: {integrity: sha512-si7QWI6zUMq56bESFvagtmzMdGOtoxfR+Sez11Mobfc7tm+VkUckk9bW2UeffTGVUbOksxmSw0AA2gs8g71NCQ==}
@@ -14970,7 +14964,6 @@ packages:
   /y18n@5.0.8:
     resolution: {integrity: sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==}
     engines: {node: '>=10'}
-    dev: true
 
   /yaeti@0.0.6:
     resolution: {integrity: sha512-MvQa//+KcZCUkBTIC9blM+CU9J2GzuTytsOUwf2lidtvkx/6gnEp1QvJv34t9vdjhFmha/mUiNDbN0D0mJWdug==}
@@ -15030,7 +15023,6 @@ packages:
       string-width: 4.2.3
       y18n: 5.0.8
       yargs-parser: 21.1.1
-    dev: true
 
   /yocto-queue@0.1.0:
     resolution: {integrity: sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==}