makemkv: Remove hardcodes/hard dependencies

Even without a drive it is useful for working with disc images.

users/simon/modules/makemkv.nix

@@ -3,6 +3,7 @@ let
   # TODO: Do not hardcode /dev/{sr0,sg2} (right paths on sayuri)
   makemkv-sandbox = pkgs.writeShellScriptBin "makemkv-sandbox" /* bash */ ''
     set -euo pipefail
+    mkdir -p $HOME/.MakeMKV
     ${pkgs.bubblewrap}/bin/bwrap \
         --tmpfs /tmp \
         --proc /proc \
@@ -17,10 +18,10 @@ let
         --ro-bind /run/opengl-driver /run/opengl-driver \
         --ro-bind /etc/fonts /etc/fonts \
         --new-session \
-        --bind /home/simon/.MakeMKV /home/simon/.MakeMKV \
-        --dev-bind /dev/sr0 /dev/sr0 \
-        --dev-bind /dev/sg2 /dev/sg2 \
-        --dev-bind /sys/bus/scsi /sys/bus/scsi \
+        --bind $HOME/.MakeMKV $HOME/.MakeMKV \
+        --dev-bind-try /dev/sr0 /dev/sr0 \
+        --dev-bind-try /dev/sg2 /dev/sg2 \
+        --dev-bind-try /sys/bus/scsi /sys/bus/scsi \
         --bind ''${PWD_TARGET:-$PWD} ''${PWD_TARGET:-$PWD} \
         ${pkgs.unstable.makemkv}/bin/makemkv
   '';