1) Create ~/moz
2) From ~/moz, run "cvs -d :pserver:anonymous@cvs-mirror.mozilla.org:/cvsroot co -r MOZILLA_1_8_0_BRANCH mozilla/client.mk mozilla/xulrunner/config/mozconfig"
3) Run "cd mozilla"
4) Create a file with the following contents:
. $topsrcdir/xulrunner/config/mozconfig
5) Save that file as ~/moz/mozilla/.mozconfig
3) From inside ~/moz/mozilla/, run "make -f client.mk checkout"
4) From inside ~/moz/mozilla/, run "make -f client.mk build"