diff --git a/flake.nix b/flake.nix
index fe29cf2..55badc5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,10 +1,6 @@
 {
   inputs = {
-    nixpkgs.follows = "ocaml-overlay/nixpkgs";
-
-    ocaml-overlay = {
-      url = "github:nix-ocaml/nix-overlays";
-    };
+    nixpkgs.url = "github:nixos/nixpkgs-unstable";
 
     flake-utils.url = "github:numtide/flake-utils";
 
@@ -22,11 +18,6 @@
     };
   };
 
-  nixConfig = {
-    extra-substituters = "https://anmonteiro.nix-cache.workers.dev";
-    extra-trusted-public-keys = "ocaml.nix-cache.com-1:/xI2h2+56rwFfKyyFVbkJSeGqSIYMC/Je+7XXqGKDIY=";
-  };
-
   outputs = inputs @ {
     self,
     nixpkgs,
@@ -54,9 +45,8 @@
           extra-trusted-public-keys = "ocaml.nix-cache.com-1:/xI2h2+56rwFfKyyFVbkJSeGqSIYMC/Je+7XXqGKDIY=";
         };
         minimal = let
-          inherit (pkgs) ocaml-ng;
           inherit
-            (ocaml-ng.ocamlPackages_5_2)
+            (pkgs.ocamlPackages)
             dune_3
             ocaml
             ;
@@ -65,9 +55,8 @@
           ocaml
         ];
         dev = let
-          inherit (pkgs) ocaml-ng;
           inherit
-            (ocaml-ng.ocamlPackages_5_2)
+            (pkgs.ocamlPackages)
             utop
             ocaml-lsp
             ocamlformat
@@ -108,9 +97,8 @@
 
       overlays.meat = final: _prev: let
         ocaml-deps = let
-          inherit (final) ocaml-ng;
           inherit
-            (ocaml-ng.ocamlPackages_5_2)
+            (prev.ocamlPackages)
             dune_3
             ocaml
             ;