diff --git a/nixpkgs.nix b/nixpkgs.nix
deleted file mode 100644
index 96916cbdf..000000000
--- a/nixpkgs.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-# SPDX-FileCopyrightText: 2022 Gregor Kleen <gregor.kleen@ifi.lmu.de>
-#
-# SPDX-License-Identifier: AGPL-3.0-or-later
-
-import (
-  let
-    lock = builtins.fromJSON (builtins.readFile ./flake.lock);
-  in fetchTarball {
-    url = "https://api.github.com/repos/NixOS/nixpkgs/tarball/${lock.nodes.nixpkgs.locked.rev}";
-    sha256 = lock.nodes.nixpkgs.locked.narHash;
-  }
-)
diff --git a/shell.nix b/shell.nix
index 0988cc475..926adf2ce 100644
--- a/shell.nix
+++ b/shell.nix
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-{ pkgs ? (import ./nixpkgs.nix {}).pkgs, nixpkgsPath ? null }:
+{ pkgs ? import <nixpkgs> {}, nixpkgsPath ? null }:
 
 let
   inherit (pkgs.lib) optionalString;
diff --git a/stackage.nix b/stackage.nix
index 3f04c00bb..f680fc987 100644
--- a/stackage.nix
+++ b/stackage.nix
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-{ nixpkgs ? import ./nixpkgs.nix
+{ nixpkgs ? import <nixpkgs> {}
 , snapshot ? "lts-13.21"
 }: