diff --git a/.gitea/workflows/pr-review.yml b/.gitea/workflows/pr-review.yml
index ea4b40a..e682032 100644
--- a/.gitea/workflows/pr-review.yml
+++ b/.gitea/workflows/pr-review.yml
@@ -20,18 +20,8 @@ jobs:
       (github.event_name == 'issue_comment' && github.event.issue.pull_request)
     steps:
       - uses: actions/checkout@v4
-
-      - name: Install Claude Code CLI
-        run: curl -fsSL https://claude.ai/install.sh | bash
-
-      - name: Download os-ai-pr-bot
-        run: |
-          curl -fsSL -o /usr/local/bin/os-ai-pr-bot \
-            "${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}/releases/latest/assets/os-ai-pr-bot" \
-            -H "Authorization: token ${GITHUB_TOKEN}"
-          chmod +x /usr/local/bin/os-ai-pr-bot
-
       - name: Run Claude Bot
         env:
           ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
-        run: os-ai-pr-bot
+          GITHUB_TOKEN: ${{ secrets.BOT_TOKEN }}
+        run: nix run --accept-flake-config .#
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..ce59d30
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,116 @@
+{
+  "nodes": {
+    "claude-code-nix": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1770951502,
+        "narHash": "sha256-MtgcZ9wZQYCZoLQTbhqn770iQC1h8+46bx6Q1HtZSv4=",
+        "owner": "sadjow",
+        "repo": "claude-code-nix",
+        "rev": "a697f13682fc60cda6e93eada4a9e2e4c7bac62e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "sadjow",
+        "repo": "claude-code-nix",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1770843696,
+        "narHash": "sha256-LovWTGDwXhkfCOmbgLVA10bvsi/P8eDDpRudgk68HA8=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "2343bbb58f99267223bc2aac4fc9ea301a155a16",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "claude-code-nix": "claude-code-nix",
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..7b028d3
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,43 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    claude-code-nix = {
+      url = "github:sadjow/claude-code-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, flake-utils, claude-code-nix }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        claude-code = claude-code-nix.packages.${system}.claude-code;
+
+        # Build the Haskell package
+        unwrapped = pkgs.haskell.lib.justStaticExecutables
+          (pkgs.haskellPackages.callCabal2nix "os-ai-pr-bot" ./. {});
+
+        # Wrap with claude on PATH
+        wrapped = pkgs.runCommand "os-ai-pr-bot" {
+          nativeBuildInputs = [ pkgs.makeWrapper ];
+        } ''
+          mkdir -p $out/bin
+          makeWrapper ${unwrapped}/bin/os-ai-pr-bot $out/bin/os-ai-pr-bot \
+            --prefix PATH : ${pkgs.lib.makeBinPath [ claude-code ]}
+        '';
+      in {
+        packages.default = wrapped;
+
+        devShells.default = pkgs.mkShell {
+          buildInputs = [
+            pkgs.cabal-install
+            pkgs.haskellPackages.ghc
+            pkgs.zlib
+            pkgs.pkg-config
+            claude-code
+          ];
+        };
+      }
+    );
+}