Indeed, but it satisfies it for practical purposes, and if anyone really demands that you personally provide them with the sources then why can't you just post a DVD then?
edit:
I had a little nosey around - for a noncommercial project you can just link to where you got the source from. Otherwise you need to either provide it with the product or provide a written offer to provide
3b of the GPLv3 wrote:for a charge no more than your
cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code
So for the least faff you could just stick a CD/DVD in with the box. But I don't see why you couldn't provide links to debian to satisfy people who actually want the code and provide a written offer to post a DVD to satisfy the letter of the GPL.