You can download prebuilt package from 'releases' section of this repository. Please report back with problems.
You can either run the build manually or use a docker based build script
Install required packages:
apt install git debhelper devscripts unzip build-essential
Build debs:
git clone https://github.com/Gregy/znapzend-debian.git
cd znapzend-debian
git clone -b v0.21.1 https://github.com/oetiker/znapzend
cp -r debian/ znapzend
cd znapzend
debuild --no-tgz-check -us -uc
Resulting packages are in parent directory
cd ..
Convinient build script utilizing a docker container is present in the repo. Run it like this:
./build.sh
apt install ./znapzend_*.deb