proper method for getting the source for the debian-installer for building my own test images

[Nick Gawronski]

Hi, I did apt-get source debian-installer and was told to download the 
debian-installer from git so I did this.  Then I tried to do a demo 
build of the GTK target and it failed with unable to create directories 
in /tmp and things not existing.  I then went to the debian-installer 
wiki pages and was told there to checkout the subversion sources then 
use mr to murge in the git changes.  My question is what is the correct 
method for checking out and building the debian-installer after 
installing the build dependencies using apt-get build-dep 
debian-installer as I think the README file and the wiki pages should 
all have the the same information and not two different sets of 
directions on two different pages?  Nick Gawronski