Debian tool are too fragile. :-(
# ./gen.sh -S -n -uc -us
-name=opennebula
v=5.2.0
-#wget -N -nv --no-check-certificate https://rubygems.org/downloads/opennebula-${v}.gem
-uscan --download-current-version --rename
-tar xzf ../ruby-lib${name}_${v}.orig.tar.gz
+wget -N -nv --no-check-certificate https://rubygems.org/downloads/opennebula-${v}.gem
-cp -a debian/ ${name}-${v}/
-cp -p ../ruby-lib${name}_${v}.orig.tar.gz .
-cd ${name}-${v}/
+rm -f ruby-libopennebula_${v}.orig.*
+gem unpack opennebula-${v}.gem
+tar -cf - opennebula-${v}/ | pbzip2 > ruby-libopennebula_${v}.orig.tar.bz2
+cp -a debian/ opennebula-${v}/
+
+cd opennebula-${v}/
dpkg-buildpackage "$@"