Work around

build/ci/postInstall.js

@@ -238,6 +238,23 @@ function verifyMomentIsOnlyUsedByJupyterLabCoreUtils() {
         throw new Error(`Moment is being used by other packages (${otherPackagesUsingMoment.join(', ')}).`);
     }
 }
+
+/**
+ * Work around for https://github.com/microsoft/vscode-python/issues/21720
+ * 
+ * The npm package @vscode/python-extension has a peer dependency on @types/vscode.
+ * However Jupyter extensions uses @vscode-dts with the cli arg '-f' instead of @types/vscode.
+ * The webpack builds when running the command `npm list --production --parseable --depth=99999 --loglevel=error`
+ * Work around is to remove the peerDepencency on @types/vscode.
+ */
+function fixPythonExtensionNpmPackageJson() {
+    const jsonFilePath = path.join(__dirname, '..', '..', 'node_modules','@vscode','python-extension','package.json');
+    const packageJson = JSON.parse(fs.readFileSync(jsonFilePath));
+    if (packageJson.peerDependencies && packageJson.peerDependencies['@types/vscode']) {
+        delete packageJson.peerDependencies['@types/vscode'];
+        fs.writeFileSync(jsonFilePath, JSON.stringify(packageJson, undefined, 4));
+    }
+}
 async function downloadZmqBinaries() {
     if (common.getBundleConfiguration() === common.bundleConfiguration.web) {
         // No need to download zmq binaries for web.
@@ -254,6 +271,7 @@ fixVariableNameInKernelDefaultJs();
 removeUnnecessaryLoggingFromKernelDefault();
 updateJSDomTypeDefinition();
 fixStripComments();
+fixPythonExtensionNpmPackageJson();
 verifyMomentIsOnlyUsedByJupyterLabCoreUtils();
 downloadZmqBinaries()
     .then(() => process.exit(0))