python.pkgs.pycangjie: use buildPythonPackage

mainly so that is has `pythonModule`

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

···
 { stdenv, fetchurl, bash, autoconf, automake, libtool, pkgconfig, libcangjie
-, sqlite, python, cython
+, sqlite, buildPythonPackage, cython
 }:
 
-stdenv.mkDerivation rec {
-  name = "${python.libPrefix}-pycangjie-${version}";
+let
+  rev = "361bb413203fd43bab624d98edf6f7d20ce6bfd3";
+in buildPythonPackage rec {
+  pname = "pycangjie";
   version = "1.3_rev_${rev}";
-  rev = "361bb413203fd43bab624d98edf6f7d20ce6bfd3";
+  format = "other";
 
   src = fetchurl {
-    name = "${name}.tar.gz";
     url = "https://github.com/Cangjians/pycangjie/archive/${rev}.tar.gz";
     sha256 = "12yi09nyffmn4va7lzk4irw349qzlbxgsnb89dh15cnw0xmrin05";
   };
 
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [
-    autoconf automake libtool libcangjie sqlite python cython
+    autoconf automake libtool libcangjie sqlite cython
   ];
 
   preConfigure = ''