Yes, MeeGo 1.2 Harmattan has 'dpkg-dev' package (when Harmattan SDK repository is enabled). As well as 'build-essential' (installation of 93 MB). Also 'bsdtar' is available. So 'dpkg-deb', g++, etc, are available in Nokia N9/N950.
dpkg-deb: subprocess tar -cf returned error exit status 1