diff --git a/default.nix b/default.nix
index 93ae36a..1b84a44 100644
--- a/default.nix
+++ b/default.nix
@@ -1,9 +1,21 @@
 { pkgs ? import <nixpkgs> {}, shell ? false }:
 let
+    python = let
+      packageOverrides = self: super: {
+        mysqlclient = super.mysqlclient.overridePythonAttrs(old: rec {
+          version = "1.4.6";
+          src = super.fetchPypi {
+            pname = old.pname;
+            inherit version;
+            sha256 = "f3fdaa9a38752a3b214a6fe79d7cae3653731a53e577821f9187e67cbecb2e16";
+          };
+        });
+      };
+    in pkgs.python2.override { inherit packageOverrides; self = python; };
     pyenv = pypkgs: with pypkgs; [
         greenlet twisted cython mysqlclient bcrypt
     ];
-    buildInputs = [ (pkgs.python2.withPackages pyenv) ];
+    buildInputs = [ (python.withPackages pyenv) ];
 in
 if shell then
   pkgs.mkShell { inherit buildInputs; }