to redo the ccnx experience 1, you may follow this little steps:
mkdir ccnx
cd ccnx/
hg clone http://code.nsnam.org/bake bake
export BAKE_HOME=`pwd`/bake
export PATH=$PATH:$BAKE_HOME
export PYTHONPATH=$PYTHONPATH:$BAKE_HOME
mkdir DCE; cd DCE
bake.py configure -e dce-ns3
bake.py install
. bakeSetEnv.sh
cd source/dce/myscripts/ccn-exp1/
. do-exp1.sh