In https://confluence.ez.no/display/EZP51/Automated+installation+of+eZ+Publish
It's referred ezdemo and ezflow as valid packages. eZ Webin and plain site are also part of installation packages.

Package selection
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If you want configure the package to install, in [site_types].Site_package, please ensure you set a valid package identifier.
Valid values are
ezdemo_site
ezdemo_site_clean
ezflow_site
ezflow_site_clean
If setting an invalid package identifier, unexpected issues can occur.

In 5.0, https://confluence.ez.no/display/EZP50/Automated+installation+of+eZ+Publish
The reference for the valid packages are missing.