diff --git a/manage.py b/manage.py
index 913e4f6e..00e46405 100755
--- a/manage.py
+++ b/manage.py
@@ -3,7 +3,7 @@ import os
 import sys
 
 if __name__ == "__main__":
-    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "gestioasso.settings.local")
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "gestioasso.settings")
 
     from django.core.management import execute_from_command_line
 
diff --git a/shell.nix b/shell.nix
index bdfac247..27ebda09 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,4 +1,4 @@
-{ pkgs ? (import <nixpkgs>) {}}:
+{ pkgs ? (import <nixpkgs>) { } }:
 
 let
   pypiDataRev = "2505eb53d85cd727c87611ee4aa35152821a12b2";
@@ -30,8 +30,14 @@ let
     isort
     flake8
   '';
+
+  pyEnv = mach-nix.mkPython { requirements = requirements + requirements-dev; };
 in
 
-mach-nix.mkPythonShell {
-  requirements = requirements + requirements-dev;
+pkgs.mkShell {
+  buildInputs = [ pyEnv ];
+
+  shellHook = ''
+    export DJANGO_SETTINGS_MODULE=gestioasso.settings.local
+  '';
 }