This is not really an "official" way of building packages. There are many things that wouldn't be allowed if the package were to be uploaded to Debian. But sinc

This is not really an "official" way of building packages. There are many things that wouldn't be allowed if the package were to be uploaded to Debian. But since the same tools than for regular packages are used, you can also iteratively "enhance" the package to be more policy-compliant.