{ config, lib, pkgs, ... }: { imports = [ ]; options.me = { vm_disk.enable = lib.mkOption { type = lib.types.bool; default = false; example = true; description = "Whether we want to mount the local disk for persistent storage."; }; }; config = lib.mkIf config.me.vm_disk.enable ( lib.mkMerge [ { # Mount the local disk fileSystems = { "/.disk" = lib.mkForce { device = "/dev/nvme0n1p1"; fsType = "ext4"; options = [ "noatime" "discard" ]; neededForBoot = true; }; "/persist" = { fsType = "none"; device = "/.disk/persist"; options = [ "bind" "rw" ]; depends = [ "/.disk/persist" ]; }; "/state" = { fsType = "none"; device = "/.disk/state"; options = [ "bind" "rw" ]; depends = [ "/.disk/state" ]; }; "/nix/store" = lib.mkForce { fsType = "overlay"; device = "overlay"; options = [ "lowerdir=/nix/.ro-store" "upperdir=/.disk/persist/store" "workdir=/.disk/state/work" ]; depends = [ "/nix/.ro-store" "/.disk/persist/store" "/.disk/state/work" ]; }; }; } ] ); }