No cd

src/freedombone-app-tahoelafs

     git checkout $TAHOELAFS_COMMIT -b $TAHOELAFS_COMMIT
     git submodule update --init --recursive
     virtualenv venv
-    venv/bin/pip install six packaging appdirs pycrypto==2.1.0 cryptography==1.3.4
+    venv/bin/pip install six packaging appdirs pycrypto==2.1.0
     venv/bin/pip install --editable .
     configure_firewall_for_tahoelafs
 
-    su -c "cd $TAHOE_COMMAND create-introducer /home/tahoelafs/.tahoe-introducer" - tahoelafs
+    su -c "$TAHOE_COMMAND create-introducer /home/tahoelafs/.tahoe-introducer" - tahoelafs
     TAHOELAFS_CONFIG=/home/tahoelafs/.tahoe-introducer/tahoe.cfg
     if [ ! -f $TAHOELAFS_CONFIG ]; then
         exit 62831