Update Nix instructions

01-Installation.md

@@ -1,25 +1,10 @@
 Quickemu is available in the repositories of the following distros
 (packaging status by [Repology.org](https://repology.org/)):
 
-<div align="center">
-<table>
-<tbody>
-<tr valign="top">
-<td>
-
-[![Packaging
-status of quickemu](https://repology.org/badge/vertical-allrepos/quickemu.svg?header=quickemu)](https://repology.org/project/quickemu/versions)
-
-</td>
-</tr>
-</tbody>
-</table>
-</div>
-
 ## Arch Linux
 
 Quickemu is available from the AUR (Arch user repository), and can be installed via any AUR helper. Assuming your AUR helper is yay, Run the
-following command:
+the following command:
 
 ``` shell
 yay -Sy quickemu
@@ -37,7 +22,6 @@ sudo apt-get install ./quickemu_x.y.z-1_all.deb
 ## Ubuntu
 
 Quickemu is available from a PPA for Ubuntu users.
-The Quickemu PPA also includes a backport of QEMU 6.0.0 for 20.04 (Focal) and 21.04 (Hirsute).
 To install Quickemu and all the dependencies, run the following in a terminal:
 
 ``` shell
@@ -46,37 +30,42 @@ sudo apt update
 sudo apt install quickemu
 ```
 
-## NixOS hosts
+## Nix & NixOS
 
-To quickly try `quickemu`:
+### Flake
 
-``` shell
+[![FlakeHub](https://img.shields.io/endpoint?url=https://flakehub.com/f/quickemu-project/quickemu/badge)](https://flakehub.com/flake/quickemu-project/quickemu)
+
+Stable releases of Quickemu are published to FlakeHub for Nix users. See the Quickemu flake on FlakeHub for more details:
+
+- <https://flakehub.com/flake/quickemu-project/quickemu>
+
+### Nixpkgs
+
+Add Quickemu to your `systemPackages`. For example:
+
+```nix
+systemPackages = with pkgs; [
+  quickemu
+];
+```
+
+### Nix Shell
+
+You can also quickly try `quickemu` in a Nix shell.
+
+#### New command interface
+
+```shell
+nix shell nixpkgs#quickemu
+```
+
+#### Legacy command interface
+
+```shell
 nix-shell -p quickemu
 ```
 
-To install via Nix profile:
-
-``` shell
-nix-env -iA pkgs.quickemu
-```
-
-To install via NixOS config:
-
-``` nix
-# /etc/nixos/configuration.nix
-{pkgs, ...}: {
-   environment.systemPackages = with pkgs;
-     quickemu
-   };
-}
-```
-
-To install via Flakes:
-
-``` shell
-# TODO (flake users, please add an example!)
-```
-
 ## Any Linux (installing from source)
 
 ``` shell