To rebuild a deb package (Debian/Ubuntu), download the source package (3 files) of the best matching distribution version and run (as normal user):
sudo apt-get install build-essential fakeroot
The copy the 3 source files (.dsc, .diff.gz, *.orig.tar.gz) into an empty directory,. Open a terminal and enter it with cd <dirname>.
Then:</dirname>
dpkg-source -x grandorgue-*.dsc
cd grandorgue-0.3*
dpkg-buildpackage -rfakeroot
If dpkg-buildpackage reports, that a package is missing, please install them too (sudo apt-get install <packagename).
This will build the required packages. The packages can be installed as root with "dpkg -i <package name="">". As you are not using apt-get, missing dependency will only be reported and not automatically installed.</package>