diff --git a/ifc-js/package.json b/ifc-js/package.json
index 3409f36..6c754a6 100644
--- a/ifc-js/package.json
+++ b/ifc-js/package.json
@@ -24,7 +24,7 @@
   ],
   "devDependencies": {
     "@ownclouders/eslint-config": "0.0.1",
-    "@ownclouders/extension-sdk": "file:../../web/packages/extension-sdk",
+    "@ownclouders/extension-sdk": "file:../temp-extension-sdk",
     "@ownclouders/prettier-config": "0.0.1",
     "@ownclouders/tsconfig": "0.0.4",
     "@vitejs/plugin-vue": "4.0.0",
diff --git a/jupyter/package.json b/jupyter/package.json
index 963e1ab..2df619a 100644
--- a/jupyter/package.json
+++ b/jupyter/package.json
@@ -24,7 +24,7 @@
   ],
   "devDependencies": {
     "@ownclouders/eslint-config": "0.0.1",
-    "@ownclouders/extension-sdk": "file:../../web/packages/extension-sdk",
+    "@ownclouders/extension-sdk": "file:../temp-extension-sdk",
     "@ownclouders/prettier-config": "0.0.1",
     "@ownclouders/tsconfig": "0.0.4",
     "@vitejs/plugin-vue": "4.0.0",
diff --git a/jupyter/pnpm-lock.yaml b/jupyter/pnpm-lock.yaml
index b8e51a0..8b4b7cf 100644
--- a/jupyter/pnpm-lock.yaml
+++ b/jupyter/pnpm-lock.yaml
@@ -2,7 +2,7 @@ lockfileVersion: 5.4
 
 specifiers:
   '@ownclouders/eslint-config': 0.0.1
-  '@ownclouders/extension-sdk': file:../../web/packages/extension-sdk
+  '@ownclouders/extension-sdk': file:../temp-extension-sdk
   '@ownclouders/prettier-config': 0.0.1
   '@ownclouders/tsconfig': 0.0.4
   '@vitejs/plugin-vue': 4.0.0
@@ -22,7 +22,7 @@ dependencies:
 
 devDependencies:
   '@ownclouders/eslint-config': 0.0.1_eslint@8.31.0
-  '@ownclouders/extension-sdk': file:../../web/packages/extension-sdk_6x3rzv5pigev5qtyqxczgau524
+  '@ownclouders/extension-sdk': file:../temp-extension-sdk_6x3rzv5pigev5qtyqxczgau524
   '@ownclouders/prettier-config': 0.0.1
   '@ownclouders/tsconfig': 0.0.4
   '@vitejs/plugin-vue': 4.0.0_vite@4.1.1+vue@3.2.47
@@ -2532,11 +2532,11 @@ packages:
     engines: {node: '>=10'}
     dev: true
 
-  file:../../web/packages/extension-sdk_6x3rzv5pigev5qtyqxczgau524:
-    resolution: {directory: ../../web/packages/extension-sdk, type: directory}
-    id: file:../../web/packages/extension-sdk
+  file:../temp-extension-sdk_6x3rzv5pigev5qtyqxczgau524:
+    resolution: {directory: ../temp-extension-sdk, type: directory}
+    id: file:../temp-extension-sdk
     name: '@ownclouders/extension-sdk'
-    version: 0.0.1
+    version: 0.0.1-alpha.1
     peerDependencies:
       sass: 1.58.0
       vite: ^4.1.1
diff --git a/old-web-redirector/package.json b/old-web-redirector/package.json
index ce24d5b..1df282d 100644
--- a/old-web-redirector/package.json
+++ b/old-web-redirector/package.json
@@ -24,7 +24,7 @@
   ],
   "devDependencies": {
     "@ownclouders/eslint-config": "0.0.1",
-    "@ownclouders/extension-sdk": "file:../../web/packages/extension-sdk",
+    "@ownclouders/extension-sdk": "file:../temp-extension-sdk",
     "@ownclouders/prettier-config": "0.0.1",
     "@ownclouders/tsconfig": "0.0.4",
     "@vitejs/plugin-vue": "4.0.0",
diff --git a/open-in-swan/package.json b/open-in-swan/package.json
index cd801c9..e3fb7be 100644
--- a/open-in-swan/package.json
+++ b/open-in-swan/package.json
@@ -24,7 +24,7 @@
   ],
   "devDependencies": {
     "@ownclouders/eslint-config": "0.0.1",
-    "@ownclouders/extension-sdk": "file:../../web/packages/extension-sdk",
+    "@ownclouders/extension-sdk": "file:../temp-extension-sdk",
     "@ownclouders/prettier-config": "0.0.1",
     "@ownclouders/tsconfig": "0.0.4",
     "@vitejs/plugin-vue": "4.0.0",
diff --git a/rootjs/package.json b/rootjs/package.json
index 39f9923..26b3b06 100644
--- a/rootjs/package.json
+++ b/rootjs/package.json
@@ -24,7 +24,7 @@
   ],
   "devDependencies": {
     "@ownclouders/eslint-config": "0.0.1",
-    "@ownclouders/extension-sdk": "file:../../web/packages/extension-sdk",
+    "@ownclouders/extension-sdk": "file:../temp-extension-sdk",
     "@ownclouders/prettier-config": "0.0.1",
     "@ownclouders/tsconfig": "0.0.4",
     "@vitejs/plugin-vue": "4.0.0",
diff --git a/temp-extension-sdk/index.mjs b/temp-extension-sdk/index.mjs
new file mode 100644
index 0000000..1676bdb
--- /dev/null
+++ b/temp-extension-sdk/index.mjs
@@ -0,0 +1,86 @@
+// ATTENTION: this is a .mjs (instead of a .ts) file on purpose,
+// because we don't want to transpile it before publishing
+// c.f. https://github.com/vitejs/vite/issues/5370
+
+import { mergeConfig, searchForWorkspaceRoot } from 'vite'
+import { join } from 'path'
+import { cwd } from 'process'
+import { readFileSync } from 'fs'
+
+import vue from '@vitejs/plugin-vue'
+import serve from 'rollup-plugin-serve'
+
+const distDir = 'dist'
+
+export const defineConfig = (overrides = {}) => {
+  return ({ mode }) => {
+    const isProduction = mode === 'production'
+    const isServing = !isProduction
+
+    // read package name from vite workspace
+    const packageJson = JSON.parse(
+      readFileSync(join(searchForWorkspaceRoot(cwd()), 'package.json')).toString()
+    )
+
+    const name = packageJson.name
+
+    // take vite standard config and reuse it for rollup-plugin-serve config
+    const { https, port = 9210, host = 'localhost' } = overrides?.server
+    const isHttps = !!https
+
+    if (isServing) {
+      console.log(
+        `>>> Serving extension at http${isHttps ? 's' : ''}://${host}:${port}/js/${name}.js`
+      )
+    }
+
+    return mergeConfig(
+      {
+        server: {
+          host,
+          port,
+          strictPort: true
+        },
+        resolve: {
+          alias: {
+            path: 'rollup-plugin-node-polyfills/polyfills/path'
+          }
+        },
+        build: {
+          cssCodeSplit: true,
+          minify: isProduction,
+          rollupOptions: {
+            external: ['vue', 'vuex', 'luxon', 'web-pkg', 'web-client', 'vue3-gettext'],
+            preserveEntrySignatures: 'strict',
+            input: {
+              [name]: './src/index.ts'
+            },
+            output: {
+              format: 'amd',
+              dir: distDir,
+              chunkFileNames: join('js', 'chunks', '[name]-[hash].mjs'),
+              entryFileNames: join('js', `[name]${isProduction ? '-[hash]' : ''}.js`)
+            },
+            plugins: [
+              isServing &&
+                serve({
+                  headers: {
+                    'access-control-allow-origin': '*'
+                  },
+                  contentBase: distDir,
+                  ...(https && { https }),
+                  ...(port && { port })
+                })
+            ]
+          }
+        },
+        plugins: [
+          vue({
+            customElement: false
+          })
+        ]
+      },
+      overrides
+    )
+  }
+}
diff --git a/temp-extension-sdk/package.json b/temp-extension-sdk/package.json
new file mode 100644
index 0000000..1764b31
--- /dev/null
+++ b/temp-extension-sdk/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "@ownclouders/extension-sdk",
+  "version": "0.0.1-alpha.1",
+  "description": "ownCloud Web Extension SDK",
+  "license": "AGPL-3.0",
+  "main": "index.mjs",
+  "type": "module",
+  "private": false,
+  "author": "ownCloud GmbH <devops@owncloud.com>",
+  "homepage": "https://github.com/owncloud/web/tree/master/packages/extension-sdk",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/owncloud/web",
+    "directory": "packages/extension-sdk"
+  },
+  "dependencies": {
+    "@vitejs/plugin-vue": "4.0.0",
+    "rollup-plugin-node-polyfills": "^0.2.1",
+    "rollup-plugin-serve": "^2.0.2"
+  },
+  "peerDependencies": {
+    "vite": "^4.1.1",
+    "sass": "1.58.0"
+  }
+}
diff --git a/top-bar/package.json b/top-bar/package.json
index 503becc..b736a64 100644
--- a/top-bar/package.json
+++ b/top-bar/package.json
@@ -24,7 +24,7 @@
   ],
   "devDependencies": {
     "@ownclouders/eslint-config": "0.0.1",
-    "@ownclouders/extension-sdk": "file:../../web/packages/extension-sdk",
+    "@ownclouders/extension-sdk": "file:../temp-extension-sdk",
     "@ownclouders/prettier-config": "0.0.1",
     "@ownclouders/tsconfig": "0.0.4",
     "@vitejs/plugin-vue": "4.0.0",
diff --git a/tours/package.json b/tours/package.json
index abcd964..cf0e629 100644
--- a/tours/package.json
+++ b/tours/package.json
@@ -24,7 +24,7 @@
   ],
   "devDependencies": {
     "@ownclouders/eslint-config": "0.0.1",
-    "@ownclouders/extension-sdk": "file:../../web/packages/extension-sdk",
+    "@ownclouders/extension-sdk": "file:../temp-extension-sdk",
     "@ownclouders/prettier-config": "0.0.1",
     "@ownclouders/tsconfig": "0.0.4",
     "@vitejs/plugin-vue": "4.0.0",