Hi, I decided it was time to get Csound building on my Linux (Mint) machine, and I followed the instructions in BUILD.md on github. The only step that doesn't work for me is "sudo apt-get build-dep csound". =>"E: Unable to find a source package for csound" All I have in /etc/apt/sources.list is: #deb cdrom:[Linux Mint 18.2 _Sonya_ - Release amd64 20170628]/ xenial contrib main non-free deb http://apt.gka.thinkglobally.org/ stretch main deb-src http://apt.gka.thinkglobally.org/ stretch main so what do I need as well? (At the cmake stage, I'm told I'm missing libsndfile) Thanks,