+###--------------------------------------------------------------------------
+### Preliminary definitions.
+
+## The multiarch triple.
+DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
+a := $(DEB_HOST_MULTIARCH)
+
+## My version number, shorn of the Debian package version if any.
+DEB_UPSTREAM_VERSION ?= \
+ $(shell dpkg-parsechangelog | \
+ sed -n "/^Version: \([^-]*\)\(-.*\)\?/s//\1/p")
+v := $(DEB_UPSTREAM_VERSION)
+
+## Default Debhelper options.
+DH_OPTIONS = --parallel