Persistent Vim error (E1031: Cannot use void value)

My Vim config: ((vim-full.override {}).customize { name = "vim"; # 1. Nix pulls down and installs all your plugins here vimrcConfig.packages.myplugins = { start = with vimPlugins; [ vim-nix # Native Nix language highlighting & indenting nerdtree # Standard file tree vim-airline # Standard status bar nnn-vim vim-sensible coc-pairs coc-nvim fzf-vim fzf-wrapper ayu-vim vim-airline-themes coc-basedpyright coc-cla...