Permit skipping the dependency checks

common.sh

@@ -14,6 +14,8 @@ nand_erasesize=400000
 nand_writesize=4000
 nand_oobsize=680
 
+if [[ -z ${CHECK_DEPS} ]]; then
+  
   for TOOL in ${TOOLS[@]}; do
     if [[ -z $(which $TOOL) ]]; then
       echo "  Error: Unable to locate $TOOL utility."
@@ -23,6 +25,8 @@ for TOOL in ${TOOLS[@]}; do
     fi
   done
   
+fi
+
 #------------------------------------------------------------
 onMac() {
   if [ "$(uname)" == "Darwin" ]; then