Use nvim-treesitter packages from nixpkgs

modules/editors/neovim/default.nix

@@ -62,6 +62,8 @@ in {
                   zig
                 ]
               ))
+              nvim-treesitter-context
+              nvim-treesitter-textobjects
               nvim-lspconfig
             ];
           };
@@ -129,4 +131,4 @@ in {
       v   = "nvim";
     };
   };
-}
+}

modules/editors/neovim/lua/config/plugins.lua

@@ -47,8 +47,6 @@ return packer.startup(function(use)
   use { "JoosepAlviste/nvim-ts-context-commentstring" }
   use { "kana/vim-textobj-user" }
   use { "mg979/vim-visual-multi", branch = "master" }
-  use { "nvim-treesitter/nvim-treesitter-context" }
-  use { "nvim-treesitter/nvim-treesitter-textobjects" }
   use { "p00f/nvim-ts-rainbow" }
   use { "terryma/vim-expand-region" }
   use { "tommcdo/vim-exchange", event = "VimEnter" }