translate architecture name

gistfile1.txt

diff --git a/debootstrap b/debootstrap
index bc5e522..b17bc8b 100755
--- a/debootstrap
+++ b/debootstrap
@@ -234,6 +234,23 @@ if [ $# != 0 ] ; then
 		else
 			error 1 NEEDARG "option requires an argument %s" "$1"
 		fi
+
+		case "$ARCH" in
+			x86[_-]64)
+				ARCH="amd64"
+				echo "I: set ARCH as $ARCH"
+				;;
+			x86|i[4-6]86)
+				ARCH="i386"
+				echo "I: set ARCH as $ARCH"
+				;;
+			aarch64)
+				ARCH="arm64"
+				echo "I: set ARCH as $ARCH"
+				;;
+			*)
+				;;
+		esac
 		;;
 	    --extractor|--extractor=?*)
 		if [ "$1" = "--extractor" ] && [ -n "$2" ] ; then