[
  (
    self: super:
      rec {
        #jami-ring-daemon = super.qt5.callPackage ./ov/jami/ring-daemon.nix {};
        myVim = with super; neovim.override { configure = {
          packages.myVimPackage = with pkgs.vimPlugins; {
            # loaded on start
            start = [
              ale
              base16-vim
              LanguageClient-neovim
              ctrlp
              direnv-vim
              fugitive
              haskell-vim
              jedi-vim
              nerdtree
              nerdtree-git-plugin
              supertab
              vim-pandoc
              vim-pandoc-syntax
              vim-nix
              vim-jinja
            ];
          };
          customRC = builtins.readFile ./vimrc;
        };};
        # build with debug symbols and in debug mode (less optimized)
        opencvDebug = with super; enableDebugging ((opencv3.override { enablePython = true; enableGtk3 = true; enableDocs = true; pythonPackages = pkgs.python3Packages; }).overrideAttrs (oldAttrs: rec { cmakeBuildType = "Debug"; }));
        #gnutls = super.callPackage ./ov/gnutls {inherit (super.darwin.apple_sdk.frameworks) Security;};
      }
  )

]