Forgot the name but at my last job the Linux client was something like "use this exact in-house patched .deb of $software in version X on Ubuntu Y/Z" - and that

Forgot the name but at my last job the Linux client was something like "use this exact in-house patched .deb of $software in version X on Ubuntu Y/Z" - and that's all that worked, nothing else. Kinda indistinguishable from "only runs on windows"