feat(flake.nix): rust-overlay

Author: ryoppippi

flake.nix

@@ -10,9 +10,14 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+      };
+    };
   };
 
-  outputs = { self, nixpkgs, utils, ... }:
     utils.lib.eachDefaultSystem (system:
       let
         pkgs = import nixpkgs { inherit system; };