mlt: requires python3

pkgs/development/libraries/mlt/default.nix

···
 , libvorbis, libxml2, movit, pkg-config, sox, fftw, opencv4, SDL2
 , gtk2, genericUpdater, common-updater-scripts, libebur128
 , jack2, ladspa-sdk, swig, which, ncurses
-, enablePython ? false, python
+, enablePython ? false, python3
 }:
 
 stdenv.mkDerivation rec {
···
   ] ++ lib.optional enablePython ncurses;
 
   nativeBuildInputs = [ pkg-config makeWrapper which ]
-  ++ lib.optionals enablePython [ python swig ];
+  ++ lib.optionals enablePython [ python3 swig ];
+
+  strictDeps = true;
 
   # Mostly taken from:
   # http://www.kdenlive.org/user-manual/downloading-and-installing-kdenlive/installing-source/installing-mlt-rendering-engine

pkgs/top-level/python-packages.nix

···
   mlxtend = callPackage ../development/python-modules/mlxtend { };
 
   mlt = toPythonModule (pkgs.mlt.override {
-    inherit python;
+    python3 = python;
     enablePython = true;
   });
 

pkgs/top-level/python2-packages.nix

···
 
   metaphone = callPackage ../development/python-modules/metaphone { };
 
+  mlt = disabled super.mlt;
+
   mock = callPackage ../development/python-modules/mock/2.nix { };
 
   # Needed here because moinmoin is loaded as a Python library.