diff --git a/default.nix b/default.nix
index 0ef7fe8..d3c9b62 100644
--- a/default.nix
+++ b/default.nix
@@ -1,9 +1,8 @@
 { buildDunePackage
+, lib
 , core
 , core_unix
 , findlib
-, lib
-, nix-filter
 , ocaml
 , ppx_yojson_conv
 , ppx_yojson_conv_lib
@@ -14,19 +13,7 @@
 buildDunePackage {
   pname = "flake_env";
   version = "0.1";
-  src = nix-filter {
-    root = ./.;
-    include = [
-      "bin"
-      "lib"
-      ./dune-project
-      ./flake.nix
-      ./default.nix
-      ./flake.lock
-      ./flake_env.opam
-      ./direnvrc
-    ];
-  };
+  src = ./.;
   duneVersion = "3";
   postPatch = ''
     substituteInPlace direnvrc --replace "@flake_env@" "$out/bin/flake_env"
diff --git a/flake.lock b/flake.lock
index a1e8315..d11956c 100644
--- a/flake.lock
+++ b/flake.lock
@@ -20,21 +20,6 @@
         "type": "github"
       }
     },
-    "nix-filter": {
-      "locked": {
-        "lastModified": 1701697642,
-        "narHash": "sha256-L217WytWZHSY8GW9Gx1A64OnNctbuDbfslaTEofXXRw=",
-        "owner": "numtide",
-        "repo": "nix-filter",
-        "rev": "c843418ecfd0344ecb85844b082ff5675e02c443",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "nix-filter",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1702272962,
@@ -54,7 +39,6 @@
     "root": {
       "inputs": {
         "flake-parts": "flake-parts",
-        "nix-filter": "nix-filter",
         "nixpkgs": "nixpkgs"
       }
     }
diff --git a/flake.nix b/flake.nix
index 4fd98da..2ee1ab9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,12 +6,9 @@
       url = "github:hercules-ci/flake-parts";
       inputs.nixpkgs-lib.follows = "nixpkgs";
     };
-    nix-filter = {
-      url = "github:numtide/nix-filter";
-    };
   };
 
-  outputs = inputs @ { flake-parts, nix-filter, ... }:
+  outputs = inputs @ { flake-parts, ... }:
     flake-parts.lib.mkFlake { inherit inputs; }
       ({ lib, ... }: {
         systems = [
@@ -23,7 +20,7 @@
         ];
         perSystem = { config, pkgs, self', ... }: {
           packages = {
-            flake_env = pkgs.ocamlPackages.callPackage ./default.nix { inherit nix-filter; };
+            flake_env = pkgs.ocamlPackages.callPackage ./default.nix { };
             default = config.packages.flake_env;
           };
           devShells.default = pkgs.mkShell {
@@ -35,6 +32,7 @@
               pkgs.ocamlPackages.ocaml-lsp
               pkgs.ocamlPackages.ocamlformat
               pkgs.ocamlPackages.ocamlformat-rpc-lib
+              pkgs.ocamlPackages.utop
             ];
           };
         };