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src2pkg question, what is "Reverting to Jail installation"?

Hi
I am installing from source lshw-B.02.08.01.tar.gz using src2pkg.
During the install I get the following notice.

Quote:

WARNING! DESTDIR is not supported for this package.
NOTICE - Reverting to JAIL installation.

I think it means that it is not installing in the destination directories. Reverting to jail, what does that mean?

There's more info the the HOWTO.txt file supplied with src2pkg, but here's a couple of points from it:

Code:

          One feature of the libsentry library allows us to do something similar to

          using DESTDIR -even when the sources don't support DESTDIR at all. Ths method

          is called the 'JAIL root' method. It uses the libsentry library to do the same

          thing as DESTDIR by intercepting the normal installation commands and substituting

          an alternate path before running the command in the alternate subdirectory.

[snip]

          The 'DESTDIR' and 'JAIL' methods can both be used while running src2pkg as a 

          normal user.

Your selected method (DESTDIR) could not be used, so src2pkg is trying to build the package from a "jail" in a different location.