Hello,
First, thank you all for bringing the world Tails.
My question concerns the manual build of Tails 2.0. My builds were 
successful up to 1.8.2 and now they break, as the Tor Browser cannot be 
fetched due to a DNS error in the chrooted environment.
Install the Tor Browser
Fetching 
http://torbrowser-archive.tails.boum.org/5.5//tor-browser-linux32-5.5_ar.tar.xz 
...
   % Total    % Received % Xferd  Average Speed   Time    Time     Time  
Current
                                  Dload  Upload   Total   Spent    Left  
Speed
   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:-- 
     0curl: (6) Could not resolve host: torbrowser-archive.tails.boum.org
E: config/chroot_local-hooks/10-tbb failed (exit non-zero). You should 
check for errors.
P: Begin unmounting filesystems...
real    9m1.158s
user    3m37.662s
sys    1m35.506s
+ RET=1
+ '[' -e binary.iso ']'
+ fatal 'lb build failed (1).'
+ echo 'lb build failed (1).'
lb build failed (1).
+ exit 1
+ kill -9 12774
The http_proxy variable turns out to be empty at this point. The URL is 
perfectly accessible from the build machine. When I replace it with an 
IP address (198.252.153.59) the build breaks on a SHA256 error.
Git branch is stable. The build is performed on Wheezy running within 
VirtualBox, meeting the dependencies as described here: 
https://tails.boum.org/contribute/build/#index3h1
What is going wrong here? I'm probably overlooking something obvious. 
Any hint that points me in the right direction is appreciated.
Best regards,
Ceyx
PS The rationale behind our build are some minor customizations (i.e., 
some files in /etc/skel/).