Hi, I'm using Ubuntu 15.04 and was trying to run the script ( http://www.alsa-project.org/alsa-compile.sh) but it was telling me that i don't have 'patch' package installed, but i have it. I found that the problem is because is expected that patch --version | head -1 | cut -d ' ' -f 1 would return 'patch' But instead it return 'GNU', because here the name id "GNU patch" So maybe you could change de script for: patch --version | head -1 | cut -d ' ' -f 1-2 | grep patch -o