Add stable nixpkgs. Use that for Calibre (python/qt is broken)

common/nix.nix

@@ -46,5 +46,7 @@
   };
   programs.nix-ld.enable = true;
 
-  environment.systemPackages = with pkgs; [ nvd ];
+  environment.systemPackages = with pkgs; [
+    nvd
+  ];
 }

flake.lock

@@ -21,10 +21,10 @@
     "ghostty": {
       "inputs": {
         "nixpkgs-stable": [
-          "nixpkgs"
+          "nixpkgs-stable"
         ],
         "nixpkgs-unstable": [
-          "nixpkgs"
+          "nixpkgs-unstable"
         ],
         "zig": "zig"
       },
@@ -60,7 +60,7 @@
     "home-manager": {
       "inputs": {
         "nixpkgs": [
-          "nixpkgs"
+          "nixpkgs-unstable"
         ]
       },
       "locked": {
@@ -77,7 +77,23 @@
         "type": "github"
       }
     },
-    "nixpkgs": {
+    "nixpkgs-stable": {
+      "locked": {
+        "lastModified": 1729044727,
+        "narHash": "sha256-GKJjtPY+SXfLF/yTN7M2cAnQB6RERFKnQhD8UvPSf3M=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "dc2e0028d274394f73653c7c90cc63edbb696be1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-unstable": {
       "locked": {
         "lastModified": 1728888510,
         "narHash": "sha256-nsNdSldaAyu6PE3YUA+YQLqUDJh+gRbBooMMekZJwvI=",
@@ -98,7 +114,8 @@
         "ghostty": "ghostty",
         "ghostty-hm": "ghostty-hm",
         "home-manager": "home-manager",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs-stable": "nixpkgs-stable",
+        "nixpkgs-unstable": "nixpkgs-unstable"
       }
     },
     "systems": {

flake.nix

@@ -2,16 +2,17 @@
   description = "NixOS configuration";
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-24.05";
 
     home-manager.url = "github:nix-community/home-manager";
-    home-manager.inputs.nixpkgs.follows = "nixpkgs";
+    home-manager.inputs.nixpkgs.follows = "nixpkgs-unstable";
 
     ghostty = {
       url = "git+ssh://git@github.com/ghostty-org/ghostty";
       inputs = {
-        nixpkgs-stable.follows = "nixpkgs";
-        nixpkgs-unstable.follows = "nixpkgs";
+        nixpkgs-stable.follows = "nixpkgs-stable";
+        nixpkgs-unstable.follows = "nixpkgs-unstable";
       };
     };
     ghostty-hm.url = "github:clo4/ghostty-hm-module";
@@ -20,17 +21,28 @@
   outputs =
     inputs@{
       self,
-      nixpkgs,
+      nixpkgs-stable,
+      nixpkgs-unstable,
       ghostty-hm,
       home-manager,
       ...
     }:
     let
       inherit (self) outputs;
-
       system = "x86_64-linux";
 
-      pkgs = nixpkgs.legacyPackages.${system};
+      pkgs = nixpkgs-unstable.legacyPackages.${system};
+
+      overlays-nixpkgs = final: prev: {
+        stable = import nixpkgs-stable {
+          inherit system;
+          config.allowUnfree = true;
+        };
+        unstable = import nixpkgs-unstable {
+          inherit system;
+          config.allowUnfree = true;
+        };
+      };
 
       mkHome =
         modules:
@@ -42,13 +54,18 @@
           modules = [
             ghostty-hm.homeModules.default
             ./home/common
+            (
+              { ... }:
+              {
+                nixpkgs.overlays = [ overlays-nixpkgs ];
+              }
+            )
           ] ++ modules;
         };
 
       mkHost =
         modules:
-        nixpkgs.lib.nixosSystem {
-          inherit system;
+        nixpkgs-unstable.lib.nixosSystem {
           specialArgs = {
             inherit inputs outputs;
           };

home/common/devel.nix

@@ -14,6 +14,7 @@
     ldns
     minio-client
     nil
+    nix-output-monitor
     nixd
     nixfmt-rfc-style
     nodejs_22

home/common/nix.nix

@@ -1,4 +1,8 @@
-{ outputs, ... }:
+{
+  pkgs,
+  outputs,
+  ...
+}:
 {
   nixpkgs = {
     config.allowUnfree = true;

home/dln/nemo.nix

@@ -24,7 +24,7 @@
     };
   };
 
-  home.packages = with pkgs; [ calibre ];
+  home.packages = with pkgs; [ stable.calibre ];
 
   programs.gpg.enable = true;