tazpkg uses busybox's "-c" option for md5sum; on the other hand GNU md5sum has only "--check".
Patch:
--- tazpkg~ 2014-12-05 13:44:25.000000000 +0100
+++ tazpkg 2015-02-01 17:53:04.744557735 +0100
@@ -2394,7 +2394,7 @@
fi
if [ -f $INSTALLED/$PACKAGE/$CHECKSUM ]; then
sed 's, , fs,' < $INSTALLED/$PACKAGE/$CHECKSUM | \
- $CHECKSUM -s -c || {
+ busybox $CHECKSUM -s -c || {
eval_gettext "Can't repack, \$CHECKSUM error."; echo
cd $TOP_DIR
rm -rf $TMP_DIR