fix overlays

flake.nix

@@ -97,6 +97,9 @@
         specialArgs = { inherit inputs; };
         modules = [
           ./config/hosts/lain/iso.nix
+          ({ ... }: {
+            nixpkgs.overlays = [ self.overlays.kyouma self.overlays.otherPkgs ];
+          })
         ];
       };
     };

pkgs/upgrade-system/upgrade-system.sh

@@ -13,7 +13,8 @@ while [[ $# -gt 0 ]]; do
       shift
     ;;
     --branch)
-      BRANCH=$2
+      BRANCH="$2"
+      shift
       shift
     ;;
     --no-delay)