fix: add devenv dependencies so nix flake check passes

Author: youwen5

flake.lock

@@ -5,6 +5,10 @@
     flake-parts.url = "github:hercules-ci/flake-parts";
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     devenv.url = "github:cachix/devenv";
+    devenv.inputs.nixpkgs.follows = "nixpkgs";
+    nix2container.url = "github:nlewo/nix2container";
+    nix2container.inputs.nixpkgs.follows = "nixpkgs";
+    mk-shell-bin.url = "github:rrbutani/nix-mk-shell-bin";
   };
 
   outputs =