feat(anki): use unstable anki

fanya.nix

@@ -36,7 +36,8 @@ in {
       };
 
       packages = with pkgs; [
-        anki-bin
+        unstable.anki
+
         cargo
         cargo-crev
         cargo-limit

flake.lock

@@ -176,6 +176,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1682879489,
+        "narHash": "sha256-sASwo8gBt7JDnOOstnps90K1wxmVfyhsTPPNTGBPjjg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "da45bf6ec7bbcc5d1e14d3795c025199f28e0de0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nur": {
       "locked": {
         "lastModified": 1682970362,
@@ -218,6 +234,7 @@
         "home-manager": "home-manager",
         "impermanence": "impermanence",
         "nixpkgs": "nixpkgs",
+        "nixpkgs-unstable": "nixpkgs-unstable",
         "nur": "nur",
         "nvim-cmp-vlime": "nvim-cmp-vlime",
         "rust-tools-nvim": "rust-tools-nvim",

flake.nix

@@ -2,6 +2,7 @@
   inputs = {
     impermanence.url = "github:nix-community/impermanence";
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
     nur.url = "github:nix-community/NUR";
 
     agenix = {
@@ -56,14 +57,21 @@
     };
   };
 
-  outputs = {nixpkgs, ...} @ args: {
+  outputs = {nixpkgs, nixpkgs-unstable, ...} @ args: {
-    nixosConfigurations.fanya = nixpkgs.lib.nixosSystem {
+    nixosConfigurations.fanya =
+    let
       system = "x86_64-linux";
+      overlay-unstable = final: prev: {
+        unstable = nixpkgs-unstable.legacyPackages.${prev.system};
+      };
+    in
+    nixpkgs.lib.nixosSystem {
+      inherit system;
       specialArgs = args;
       modules = [
         ./fanya.nix
 
-        (_: {nixpkgs.overlays = [(import ./overlay)];})
+        (_: {nixpkgs.overlays = [(import ./overlay) overlay-unstable];})
       ];
     };
   };

system.nix

@@ -1,4 +1,4 @@
-{nixpkgs, ...}: {
+{nixpkgs, nixpkgs-unstable, ...}: {
   imports = [
     ./hardware-configuration.nix
   ];
@@ -34,7 +34,10 @@
   };
 
   nix = {
-    registry.nixpkgs.flake = nixpkgs;
+    registry = {
+      nixpkgs.flake = nixpkgs;
+      nixpkgs-unstable.flake = nixpkgs-unstable;
+    };
     settings = {
       auto-optimise-store = true;
       trusted-users = ["root" "buffet"];