* python-crcmod is pulled in from backports as it provides a compiled crcmod required for the Google Cloud Storage CLI (gsutil).
* cloud-utils and cloud-guest-utils are pulled in from backports as they provide a fixed version of growpart to safely grow the root partition on disks >2TB.
The only additions are the necessary google-compute-engine, python-google-compute-engine, and python3-google-compute-engine packages. This image is not published on GCE however the manifest is provided here for those wishing a minimal GCE Debian image.
Debian 7 Wheezy and Backports Debian 7 Wheezy are deprecated images on GCE and are no longer supported. These manifests are provided here for historic purposes.