Include my external overlay

It includes packages that are proably useful for other people outside of
my own system configuration.

flake.lock

@@ -201,6 +201,32 @@
         "type": "github"
       }
     },
+    "nixpkgs-overlay": {
+      "inputs": {
+        "flake-utils": [
+          "flake-utils"
+        ],
+        "nix-pre-commit-hooks": [
+          "nix-pre-commit-hooks"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1620905093,
+        "narHash": "sha256-GskjPH+DhTylKOWRDaFVzpH/1s4zKO4MAdL9IOlbR6M=",
+        "ref": "master",
+        "rev": "09fbbfd0f98ba82e1dc9fd0d21ab898b901ea5e8",
+        "revCount": 6,
+        "type": "git",
+        "url": "https://git.sbruder.de/simon/nixpkgs-overlay"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.sbruder.de/simon/nixpkgs-overlay"
+      }
+    },
     "nixpkgs-unstable": {
       "locked": {
         "lastModified": 1620387763,
@@ -229,6 +255,7 @@
         "nix-pre-commit-hooks": "nix-pre-commit-hooks",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs",
+        "nixpkgs-overlay": "nixpkgs-overlay",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "sops-nix": "sops-nix"
       }

flake.nix

@@ -26,6 +26,11 @@
     infinisilSystem.url = "github:Infinisil/system/91c5df20db68a995155218c5334db0e394185ca8";
     infinisilSystem.flake = false;
 
+    nixpkgs-overlay.url = "git+https://git.sbruder.de/simon/nixpkgs-overlay";
+    nixpkgs-overlay.inputs.flake-utils.follows = "flake-utils";
+    nixpkgs-overlay.inputs.nixpkgs.follows = "nixpkgs";
+    nixpkgs-overlay.inputs.nix-pre-commit-hooks.follows = "nix-pre-commit-hooks";
+
     bang-evaluator.url = "git+https://git.sbruder.de/simon/bangs";
     bang-evaluator.inputs.flake-utils.follows = "flake-utils";
     bang-evaluator.inputs.nixpkgs.follows = "nixpkgs";
@@ -51,6 +56,7 @@
     , nix-pre-commit-hooks
     , nixos-hardware
     , nixpkgs
+    , nixpkgs-overlay
     , nixpkgs-unstable
     , sops-nix
     }: flake-utils.lib.eachDefaultSystem
@@ -190,6 +196,7 @@
             ({ config, ... }: {
               nixpkgs.overlays = [
                 self.overlay
+                nixpkgs-overlay.overlay
                 (final: prev: {
                   unstable = import nixpkgs-unstable {
                     inherit system;

pkgs/cyanrip/default.nix

@@ -1,35 +0,0 @@
-{ lib
-, stdenv
-, fetchFromGitHub
-, meson
-, ninja
-, pkg-config
-, ffmpeg
-, libcdio
-, libcdio-paranoia
-, curl
-, libmusicbrainz5
-}:
-
-stdenv.mkDerivation rec {
-  pname = "cyanrip";
-  version = "0.7.0";
-
-  src = fetchFromGitHub {
-    owner = "cyanreg";
-    repo = pname;
-    rev = "v${version}";
-    sha256 = "0lgb92sfpf4w3nj5vlj6j7931mj2q3cmcx1app9snf853jk9ahmw";
-  };
-
-  nativeBuildInputs = [ meson ninja pkg-config ];
-  buildInputs = [ ffmpeg libcdio libcdio-paranoia curl libmusicbrainz5 ];
-
-  meta = with lib; {
-    description = "Fully featured CD ripping program able to take out most of the tedium";
-    homepage = "https://github.com/cyanreg/cyanrip";
-    license = with licenses; [ lgpl21Plus lgpl3Plus ]; # some files have lgpl21Plus header, repo has lgpl3Plus LICENSE
-    maintainers = with maintainers; [ sbruder ];
-    platforms = platforms.unix;
-  };
-}

pkgs/default.nix

@@ -44,8 +44,6 @@ in
     ];
   });
 
-  cyanrip = callPackage ./cyanrip { };
-
   # TODO: Remove when pavucontrol > 4.0 is released
   pavucontrol = prev.pavucontrol.overrideAttrs (o: o // {
     patches = [