diff --git a/tensorflow.sh b/tensorflow.sh
index e330f7c..9d912d8 100755
--- a/tensorflow.sh
+++ b/tensorflow.sh
@@ -4,9 +4,6 @@ set -u
 set -e
 set -o pipefail
 
-_here=`dirname $(realpath $0)`
-. ${_here}/helpers/helpers
-
 XMLPARSE="${_here}/helpers/tf-xml-filelist.py"
 
 TF_UPSTREAM_BASE_URL=${TUNASYNC_UPSTREAM_URL:-"https://storage.googleapis.com/tensorflow"}
@@ -19,7 +16,7 @@ TF_UPSTREAM_BASE_URL=${TF_UPSTREAM_BASE_URL%/}
 failed=0
 wget -O - "${TF_UPSTREAM_BASE_URL}/" | ${XMLPARSE} | while read -a tokens; do
 	filename=${tokens[0]}
-	filesize=${tokens[1]}
+	pkgsize=${tokens[1]}
 	
 	# Notice: the filename starts with no leading '/'!
 	pkgurl="${TF_UPSTREAM_BASE_URL}/${filename}"
@@ -27,11 +24,22 @@ wget -O - "${TF_UPSTREAM_BASE_URL}/" | ${XMLPARSE} | while read -a tokens; do
 	pkgdir=`dirname ${pkgdst}`
 	mkdir -p ${pkgdir}
 	
-	echo "downloading ${pkgurl}"
+	declare downloaded=false
+	if [[ -f ${pkgdst} ]]; then
+		local_size=`stat -c "%s" ${pkgdst}`
+		if [ ${local_size} -eq ${pkgsize} ]; then
+			downloaded=true
+			echo "Skipping ${pkgdst}, size ${pkgsize}"
+		fi
+	fi
+	[[ $downloaded == true ]] && continue
+
+	echo "downloading ${pkgurl} to ${pkgdst}"
 	if [[ -z ${DRY_RUN:-} ]]; then
-		check-and-download ${pkgurl} ${pkgdst} || failed=1
+		wget ${WGET_OPTIONS:-} -q -O ${pkgdst} ${pkgurl} || failed=1
 	fi
 done
+
 exit $failed