Merge pull request #27003 from backstage/rugvip/preserve

cli: use preserveModules for CJS builds

packages/cli/src/lib/builder/config.ts

@@ -123,6 +123,8 @@ export async function makeRollupConfigs(
         format: 'commonjs',
         interop: 'compat',
         sourcemap: true,
+        preserveModules: true,
+        preserveModulesRoot: `${targetDir}/src`,
         exports: 'named',
       });
     }