diff --git a/lib/types/filesystem.nix b/lib/types/filesystem.nix
index 4ab0f0d8..1edc862e 100644
--- a/lib/types/filesystem.nix
+++ b/lib/types/filesystem.nix
@@ -86,6 +86,7 @@
           if (config.format == "xfs") then [ pkgs.xfsprogs ]
           else if (config.format == "btrfs") then [ pkgs.btrfs-progs ]
           else if (config.format == "vfat") then [ pkgs.dosfstools ]
+          else if (config.format == "exfat") then [ pkgs.exfat ]
           else if (config.format == "ext2") then [ pkgs.e2fsprogs ]
           else if (config.format == "ext3") then [ pkgs.e2fsprogs ]
           else if (config.format == "ext4") then [ pkgs.e2fsprogs ]
diff --git a/lib/types/mdadm.nix b/lib/types/mdadm.nix
index 1564e178..65f17151 100644
--- a/lib/types/mdadm.nix
+++ b/lib/types/mdadm.nix
@@ -43,11 +43,11 @@
             --force \
             --homehost=any \
             "''${disk_devices[@]}"
-          partprobe /dev/md/${config.name}
           udevadm trigger --subsystem-match=block
           udevadm settle
           # for some reason mdadm devices spawn with an existing partition table, so we need to wipe it
           sgdisk --zap-all /dev/md/${config.name}
+          partprobe /dev/md/${config.name}
         fi
         ${lib.optionalString (config.content != null) config.content._create}
       '';