diff --git a/flake.lock b/flake.lock
index efe68e5..35b2aa7 100644
--- a/flake.lock
+++ b/flake.lock
@@ -138,32 +138,18 @@
         "type": "github"
       }
     },
-    "nixpkgs_3": {
-      "locked": {
-        "lastModified": 1733838633,
-        "narHash": "sha256-51x/FRiqMGQMyP+aSTp5b36WxsvT7q9KYtW2f+7+HoI=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "cdb5bd9f4fe066d1726cd848ad5858eb36a2ca93",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "cdb5bd9f4fe066d1726cd848ad5858eb36a2ca93",
-        "type": "github"
-      }
-    },
     "ocaml-overlay": {
       "inputs": {
-        "nixpkgs": "nixpkgs_3"
+        "nixpkgs": [
+          "nixpkgs"
+        ]
       },
       "locked": {
-        "lastModified": 1733872709,
-        "narHash": "sha256-CSjVHftyEGmkDeheoWDjQECIrgASNy8FNc0fqIFvcwM=",
+        "lastModified": 1734156418,
+        "narHash": "sha256-7I6hKojqDm0Z+q9ZvDk8R5J/TfoPbprmVquwfQIzQrg=",
         "owner": "nix-ocaml",
         "repo": "nix-overlays",
-        "rev": "8a82971570aafb4233340ef429ba672fd780b5ac",
+        "rev": "3bd751c1d602713195432d4818b35d29c4b1dccc",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 6cef530..f1c5cec 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,8 +2,11 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
 
-    ocaml-overlay.url = "github:nix-ocaml/nix-overlays";
-
+    ocaml-overlay = {
+      url = "github:nix-ocaml/nix-overlays";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    
     flake-utils.url = "github:numtide/flake-utils";
 
     nh.url = "github:viperML/nh";