diff --git a/pkgs/development/python-modules/exdown/default.nix b/pkgs/development/python-modules/exdown/default.nix
index 506d69a41a19..09470125179b 100644
--- a/pkgs/development/python-modules/exdown/default.nix
+++ b/pkgs/development/python-modules/exdown/default.nix
@@ -18,7 +18,8 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-r0SCigkUpOiba4MDf80+dLjOjjruVNILh/raWfvjXA0=";
+    extension = "zip";
+    hash = "sha256-+IN+0P4SljUWxF01Ln9PgeFVA/+qGKFVoKMGluAuYDw=";
   };
 
   nativeBuildInputs = [ setuptools ];