www.makemkv.com

Hello every body !
I'm under Linux (Nixos) and i install Makemkv with package pkgs ! ( if i install with flatpack i have the same problem )
Makemkv don't find my drive , it's a Pioneer BD-RW BDR-UD04(1.14)
I don't know what to do, I'm not an expert !

load the kernel module sg with modprobe

sudo modprobe sg ?

Yes and it's volatile (which means the "effect" would be gone after a reboot).

If you want to make it "persistent" you need a "modules-load.d" conf but I suppose in NixOS you don't just create it manually but do it "the Nix way".