New package name after FlatPkgUnpacker process
It looks like they changed the filename from webex.pkg to Cisco Webex Meetings Cloud.pkg. After this minor change everything went as expected.
<key>destination_path</key>
<string>%RECIPE_CACHE_DIR%/installer_payload</string>
<key>pkg_payload_path</key>
- <string>%RECIPE_CACHE_DIR%/installer_unpack/webex.pkg/Payload</string>
+ <string>%RECIPE_CACHE_DIR%/installer_unpack/Cisco Webex Meetings Cloud.pkg/Payload</string>
<key>purge_destination</key>
<true />
</dict>
