python3Packages.kiwisolver: disable on older Python releases

pkgs/development/python-modules/kiwisolver/default.nix

@@ -5,18 +5,24 @@
 , libcxx
 , cppy
 , setuptools-scm
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "kiwisolver";
   version = "1.4.2";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-f2BtkbiogWvkdlE6d/0wq+ZiJwOb1vi0BsNIywJH3Mk=";
+    hash = "sha256-f2BtkbiogWvkdlE6d/0wq+ZiJwOb1vi0BsNIywJH3Mk=";
   };
 
-  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
+  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin [
+    "-I${lib.getDev libcxx}/include/c++/v1"
+  ];
 
   nativeBuildInputs = [
     setuptools-scm
@@ -26,11 +32,14 @@ buildPythonPackage rec {
     cppy
   ];
 
-  pythonImportsCheck = [ "kiwisolver" ];
+  pythonImportsCheck = [
+    "kiwisolver"
+  ];
 
   meta = with lib; {
-    description = "A fast implementation of the Cassowary constraint solver";
+    description = "Implementation of the Cassowary constraint solver";
     homepage = "https://github.com/nucleic/kiwi";
     license = licenses.bsd3;
+    maintainers = with maintainers; [ ];
   };
 }