Your code:

apt-get source wireless-regdb crda
apt-get build-dep wireless-regdb crda

openssl genrsa -out ~/.wireless-regdb-sputnik.key.priv.pem 2048
openssl rsa -in ~/.wireless-regdb-sputnik.key.priv.pem -out sputnik.key.pub.pem -pubout -outform PEM

cd wireless-regdb-2016.06.10

edit debian/rules file so REGDB_AUTHOR is sputnik
edit debian/rules db.txt, change power/freq values

cp ../sputnik.key.pub.pem ../crda-3.13/pubkeys/
debuild -i -us -uc -b
cd ../crda-3.13/
debuild -i -us -uc -b

link: http://p.lr.lt/?hash=9faed31d547f70e705718dbb3598c142