The ZenPack edit page allows you to specify versions of Zenoss that your ZenPack is compatible with as well as dependencies on other ZenPacks. The first item in the Dependencies section of that page is the version of Zenoss that is required. If that field is blank then your ZenPack will be installable under any version of Zenoss version 2.2 or later. If you enter a specific version number then the ZenPack will run only under that exact version of Zenoss, this is usually not desirable. The most typical verson requirement is to specify that the ZenPack is compatible with any version of Zenoss equal to or greater than a specific version. The syntax for this is ">=X" where X is the minimum version the ZenPack requires. For example, if a ZenPack requires Zenoss version 2.2.1 or greater the version specification would be

>=2.2.1

Below the Zenoss version specification is a list of all other ZenPack eggs installed. Old-style (non-egg) ZenPacks can not be listed as dependencies and do not appear in this list. If your ZenPack requires another ZenPack to be installed then check the checkbox to the left of the other ZenPack's name. Optionally you can also give a version specification for each ZenPack you require.