move package overrides to overlay

home/config.nix

@@ -4,6 +4,7 @@ let
 in
   {
 
+    firefox.enablePlasmaBrowserIntegration = true;
     clementine.spotify = false;
     whitelistedLicenses = with lib.licenses; [ wtfpl ];
     vim =
@@ -11,38 +12,4 @@ in
       python = true;
       multibyteSupport = true;
     };
-
-    packageOverrides = pkgs: with pkgs;
-    rec {
-      myVim = (vim_configurable.override {python = python3;}).customize {
-            # executable/ package name
-            name = "vim";
-            vimrcConfig.packages.myVimPackage = with pkgs.vimPlugins; {
-          # loaded on start
-          start = [
-            ale
-            ctrlp
-            #deoplete-jedi
-            direnv-vim
-            fugitive
-            jedi-vim
-            nerdtree
-            nerdtree-git-plugin
-            supertab
-            vim-pandoc
-            vim-pandoc-syntax
-            vim-nix
-            vim-jinja
-          ];
-        };
-        vimrcConfig.customRC = 
-          ''if filereadable($HOME . "/.vimrc")
-            source ~/.vimrc
-          endif
-          '';
-      };
-      # build with debug symbols and in debug mode (less optimized)
-      opencvDebug = enableDebugging ((opencv3.override {enablePython=true; enableGtk3=true; enableDocs=true; pythonPackages=pkgs.python3Packages; }).overrideAttrs (oldAttrs: rec {cmakeBuildType = "Debug";}));
-    };
-
   }