Use ruby-nix for development environment

flake.lock

@@ -37,7 +37,28 @@
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "ruby-nix": "ruby-nix"
+      }
+    },
+    "ruby-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1681695382,
+        "narHash": "sha256-RBZnSdx3dnUg3o+FiQVKKeKZN6pntYb19mXnnA5b/i8=",
+        "owner": "sagittaros",
+        "repo": "ruby-nix",
+        "rev": "b1edcbec13c9f15915a900b1fb87d9c3ef1e882b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "sagittaros",
+        "repo": "ruby-nix",
+        "type": "github"
       }
     },
     "systems": {

flake.nix

@@ -4,9 +4,12 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     flake-utils.url = "github:numtide/flake-utils";
+
+    ruby-nix.url = "github:sagittaros/ruby-nix";
+    ruby-nix.inputs.nixpkgs.follows = "nixpkgs";
   };
 
-  outputs = inputs@{ self, nixpkgs, ... }:
+  outputs = inputs@{ self, ruby-nix, nixpkgs, ... }:
     let systems = inputs.flake-utils.lib.defaultSystems;
     in inputs.flake-utils.lib.eachSystem systems (system:
       let
@@ -14,7 +17,7 @@
       in
       {
         devShells.default =
-          import ./shell.nix { inherit pkgs; };
+          import ./shell.nix { inherit pkgs ruby-nix; };
 
         formatter = pkgs.treefmt;
       });

shell.nix

@@ -1,17 +1,21 @@
-{ pkgs ? import <nixpkgs> { } }:
+{ pkgs ? import <nixpkgs> { }, ruby-nix }:
 
 with pkgs;
 
 let
-  gems = bundlerEnv {
+  gems = ruby-nix.lib pkgs {
     name = "asciidoctor-foodogsquared-extensions";
-    gemdir = ./.;
+    ruby = ruby_3_1;
+    gemset = ./gemset.nix;
   };
 in
 mkShell {
+  buildInputs = [
+    gems.env
+    gems.ruby
+  ];
+
   packages = [
-    gems
-    gems.wrappedRuby
     bundix
 
     # Formatters