* List available chroots:
+<pre><code>
$ schroot -l
+</code></pre>
* Begin a persistent schroot session on Debian unstable:
+<pre><code>
$ schroot -b -c sid -n mysid
+</code></pre>
* Update and upgrade Debian unstable chroot:
+<pre><code>
$ dd-schroot-cmd -c mysid apt-get update
$ dd-schroot-cmd -c mysid apt-get upgrade
[..]
Do it for real [Y/n]: <Enter>
[..]
+</code></pre>
* Install your broken package build dependencies:
+<pre><code>
$ dd-schroot-cmd -c mysid apt-get build-dep gentoo
[..]
Do it for real [Y/n]: <Enter>
[..]
+</code></pre>
* Change root to Debian unstable chroot:
+<pre><code>
$ schroot -r -c mysid
+</code></pre>
* Download your broken package source:
+<pre><code>
(sid_arch-dchroot)user@porterbox:~$ apt-get source gentoo
+</code></pre>
* You should be able to reproduce your issue, hack on the package, fix the bug. Once you are done with your work, please, finish your schroot session:
+<pre><code>
(sid_arch-dchroot)user@porterbox:~$ exit
$ schroot -e -c mysid
$ exit
+</code></pre>
* You should be done by now. If you find any issue, please report to debian-admin@lists.debian.org.