diff --git a/pkgs/development/python-modules/somajo/default.nix b/pkgs/development/python-modules/somajo/default.nix
index 14530ec68aba..41fe8bfc20c3 100644
--- a/pkgs/development/python-modules/somajo/default.nix
+++ b/pkgs/development/python-modules/somajo/default.nix
@@ -3,13 +3,14 @@
 , fetchFromGitHub
 , buildPythonPackage
 , pythonOlder
+, setuptools
 , regex
 }:
 
 buildPythonPackage rec {
   pname = "somajo";
   version = "2.3.0";
-  format = "setuptools";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
@@ -20,6 +21,10 @@ buildPythonPackage rec {
     hash = "sha256-CNGSol77Q3uAZPLeV43NhIffO31tnZoMYOsevkZh3pc=";
   };
 
+  nativeBuildInputs = [
+    setuptools
+  ];
+
   propagatedBuildInputs = [
     regex
   ];