anchor.diff:            "workdir=/workdir"
           ];
           neededForBoot = true;
  -      })
  +      } ])
       ];
   
       boot.initrd.availableKernelModules = [ "squashfs" "iso9660" "usb-storage" ];
  
positive.code:       ];
  
      fileSystems = mkMerge [
        (mkOrder 0 {
          mountPoint = "/";
          fsType = "tmpfs";
          options = [
  
negative.code:           "mode=0755"
          ];
          neededForBoot = true;
        } ])
  
        # Note that /dev/root is a symlink to the actual root device
        # specified on the kernel command line, created in the stage 1
        # init script.
        (mkOrder 1 [ {
          mountPoint = "/iso";
          device = "/dev/root";
          neededForBoot = true;
          noCheck = true;
        } ])
  
        # In stage 1, mount a tmpfs on top of /nix/store (the squashfs
        # image) to make this a live CD.
        (mkOrder 2 [ {
          mountPoint = "/nix/.ro-store";
          fsType = "squashfs";
          device = "/iso/nix-store.squashfs";
  