4 mediapkgs = [
  5   mpv
  6   mpc_cli
  7   (ncmpcpp.override {
  8      visualizerSupport = true;
  9      outputsSupport = true;
 10      taglibSupport = true;
 11      clockSupport = true;
 12   })
 13 ];
 14 systempkgs = [
 15   htop
 16   arandr
 17   tree
 18   feh
 19   dnsutils
 20   gotop
 21   netcat
 22 ];
 23 xpkgs = [
 24   xfontsel
 25   bspwm
 26   sxhkd
 27   scrot
 28   rofi
 29   rxvt_unicode
 30 ];
 31 progpkgs = [
 32   ghc
 33   sbcl
 34   racket
 35   python
 36 ];
 37 custompkgs = [
 38   (callPackage ~/nix/swatch.nix {})
 39   (callPackage ~/nix/urbit.nix {})
 40   (callPackage ~/nix/utils.nix {})
 41 ];
 42 chatpkgs = [
 43   weechat
 44   gajim
 45 ];
 46 browserpkgs = [
 47   qutebrowser
 48 ];
 49 apppkgs = [
 50   inkscape
 51   zathura
 52   krita
 53   deluge
 54 ];
 55 gamepkgs = [
 56   sgtpuzzles
 57 ];
 58 vimpkgs = [
 59   (with import <nixpkgs> {};
 60      vim_configurable.customize {
 61         name = "vim";
 62         vimrcConfig.customRC = ''
 63            syntax enable
 64            set number
 65            set expandtab
 66            set wildmenu
 67            set backspace=eol,indent,start
 68
 69            vmap <C-c><C-c> <Plug>SendSelectionToTmux
 70            nmap <C-c><C-c> <Plug>NormalModeSendToTmux
 71            nmap <C-c>r <Plug>SetTmuxVars
 72         '';
 73         vimrcConfig.vam.knownPlugins = pkgs.vimPlugins;
 74         vimrcConfig.vam.pluginDictionaries = [{
 75            names = [
 76               "tslime"
 77            ];
 78         }];
 79      }
 80   )
 81 ];

 88 home.packages = with pkgs; (
 89    [vimpkgs] ++
 90    [gamepkgs] ++
 91    [apppkgs] ++
 92    [browserpkgs] ++
 93    [chatpkgs] ++
 94    [custompkgs] ++
 95    [progpkgs] ++
 96    [xpkgs] ++
 97    [systempkgs] ++
 98    [mediapkgs]
 99 );

> home-manager switch

error: undefined variable 'mpv' at /home/shaun/.config/nixpkgs/home.nix:5:3
(use '--show-trace' to show detailed location information)