Anonymous
The build-depends list of required packages is stated within the debian/control file.
You can extract the content of the tar.xz into directory ~/workingdir/
and install the listed build-depends packages (plus the generic “build-essential” package)
cd ~/workingdir
dpkg-buildpackage -b -us -uc
cd ..
If the operation is successful, the newly-created .deb will be present as ~/pkgname_and_version.deb
and you can
sudo dpkg -i pkgname_and_version.deb