tsung: use Python 3

pkgs/applications/networking/tsung/default.nix

@@ -1,25 +1,34 @@
-{ fetchurl, stdenv, lib, makeWrapper,
-  erlang,
-  python2, python2Packages,
-  perlPackages,
-  gnuplot }:
+{ lib
+, stdenv
+, fetchurl
+, makeWrapper
+, erlang
+, python3
+, python3Packages
+, perlPackages
+, gnuplot
+}:
 
 stdenv.mkDerivation rec {
   pname = "tsung";
   version = "1.7.0";
+
   src = fetchurl {
     url = "http://tsung.erlang-projects.org/dist/tsung-${version}.tar.gz";
     sha256 = "6394445860ef34faedf8c46da95a3cb206bc17301145bc920151107ffa2ce52a";
   };
 
-  nativeBuildInputs = [ makeWrapper ];
+  nativeBuildInputs = [
+    makeWrapper
+  ];
+
   propagatedBuildInputs = [
     erlang
     gnuplot
     perlPackages.perl
     perlPackages.TemplateToolkit
-    python2
-    python2Packages.matplotlib
+    python3
+    python3Packages.matplotlib
   ];
 
 
@@ -43,8 +52,8 @@ stdenv.mkDerivation rec {
       can currently be used to stress HTTP, WebDAV, SOAP, PostgreSQL, MySQL,
       AMQP, MQTT, LDAP and Jabber/XMPP servers.
     '';
-    license = licenses.gpl2;
-    maintainers = [ maintainers.uskudnik ];
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ uskudnik ];
     platforms = platforms.unix;
   };
 }