diff --git a/hosts/12kingdoms-shoukei/hardware-configuration.nix b/hosts/12kingdoms-shoukei/hardware-configuration.nix
index 77491853..5947a59d 100644
--- a/hosts/12kingdoms-shoukei/hardware-configuration.nix
+++ b/hosts/12kingdoms-shoukei/hardware-configuration.nix
@@ -67,6 +67,15 @@ in {
     };
   };
 
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/01CE-1DFD";
+    fsType = "vfat";
+    options = [
+      "fmask=0022"
+      "dmask=0022"
+    ];
+  };
+
   # equal to `mount -t tmpfs tmpfs /`
   fileSystems."/" = {
     device = "tmpfs";
@@ -79,11 +88,6 @@ in {
     ];
   };
 
-  fileSystems."/boot" = {
-    device = "/dev/nvme0n1p1";
-    fsType = "vfat";
-  };
-
   fileSystems."/nix" = {
     inherit device;
     fsType = "btrfs";
diff --git a/nixos-installer/README.shoukei.md b/nixos-installer/README.shoukei.md
index d1cd8200..ffc582eb 100755
--- a/nixos-installer/README.shoukei.md
+++ b/nixos-installer/README.shoukei.md
@@ -223,7 +223,7 @@ Clone this repository:
 
 ```bash
 # enter an shell with git/vim/ssh-agent/gnumake available
-nix-shell -p git neovim just --option substituters "https://mirrors.ustc.edu.cn/nix-channels/store"
+nix-shell -p git neovim --option substituters "https://mirrors.ustc.edu.cn/nix-channels/store"
 
 # clone this repository
 git clone https://github.com/ryan4yin/nix-config.git
@@ -287,7 +287,7 @@ cp -r ../nix-config /mnt/etc/nixos
 # sync the disk, unmount the partitions, and close the encrypted device
 sync
 swapoff /mnt/swap/swapfile
-umount -R /mnt
+umount -R /mnt/{nix,tmp,swap,persistent,snapshots,boot}
 cryptsetup close /dev/mapper/crypted-nixos
 reboot
 ```