docs: update README

Remove info that no longer applies

README.md

@@ -2,44 +2,26 @@
 
 **My personal [NUR](https://github.com/nix-community/NUR) repository**
 
-[![CI](https://github.com/xeals/nur-packages/actions/workflows/build.yml/badge.svg)](https://github.com/xeals/nur-packages/actions) [![Cachix Cache](https://img.shields.io/badge/cachix-xeals-blue.svg)](https://xeals.cachix.org)
+[CI](https://git.xeals.me/xeals/nur-packages/actions) [![Cachix Cache](https://img.shields.io/badge/cachix-xeals-blue.svg)](https://xeals.cachix.org)
 
-## Noteworthy packages
+## Using
 
-### Jetbrains with plugins
-
-A fan of the Emacs/Vim/VSCode plugin builder? Now enjoy it with your favourite Jetbrains IDE!
-
-The system is mostly proof-of-concept and there are a couple of issues with it at the moment, but it works for what is available in the repo.
-
-#### Using
+Using packages is easier through the combined [NUR](https://github.com/nix-community/NUR) flake.
 
 ```nix
-{ pkgs ? import <nixpkgs> {} }:
-let
-  xeals = import (builtins.fetchTarball "https://git.xeal.me/xeals/nur-packages/archive/master.tar.gz") {
-    inherit pkgs;
+# flake.nix
+{
+  inputs = {
+    xeals.url = "git+https://git.xeal.me/xeals/nur-packages"; # Direct
+    xeals.url = "github:xeals/nur-packages"; # GitHub mirror
   };
-in
-  # e.g., for IntelliJ IDEA
-  xeals.jetbrains.ideaCommunityWithPlugins (jpkgs: [
-    jpkgs.ideavim
-    jpkgs.checkstyle-idea
-  ])
+  
+  outputs = { nixpkgs, xeals, ... }: {
+    nixosConfigurations.foo = nixpkgs.lib.nixosSystem {
+      modules = [
+        xeals.nixosModules.betanin
+      ];
+    };
+  };
+}
 ```
-
-#### Issues
-
-- [ ] The plugin derivation overrides the base instead of extending it; this is really only an issue for the open-source IDEs, and only once they're actually built from source (instead of repackaging the JARs)
-- [ ] Plugins must be manually added to the repo; long-term, I'd really want some way to scrape them, or at least have a script to add and update
-
-### spotify-ripper
-
-`spotify-ripper` is pretty flexible in the formats it supports, so the derivation allows you to customize which support packages to build with.
-
-The default package comes with nothing (which is not entirely useful -- this will probably change at some point). See [the builder](./pkgs/tools/misc/spotify-ripper/default.nix) for options.
-
-## General issues
-
-- [ ] `spotify-ripper` does not build on stable NixOS channels before 20.09 when built with m4a or mp4 support, as `fdk-aac-encoder` is not available
-- [ ] Due to changes in toolchains affected fixed output hashes, anything using `buildGoModule` and `buildRustPackage` will fail on NixOS 20.03. Override the hashes of `vendor` and `cargoDeps` attributes as needed