I tried to add nixpkgs master...

Signed-off-by: Alex Stan <stan.alexandru@ichb.ro>

flake.lock

@@ -565,6 +565,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-master": {
+      "locked": {
+        "lastModified": 1683964299,
+        "narHash": "sha256-4wzIhSjf+r3UC+1oS/hKW/kjMBEn7Bbvy9cIok6jZPY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "1f68716877f8fde4c9f70ee2b237b3f405792b98",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "master",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgsV1": {
       "locked": {
         "lastModified": 1678500271,
@@ -786,7 +802,8 @@
         "nix-doom-emacs": "nix-doom-emacs",
         "nix-software-center": "nix-software-center",
         "nixos-hardware": "nixos-hardware",
-        "nixpkgs": "nixpkgs_4"
+        "nixpkgs": "nixpkgs_4",
+        "nixpkgs-master": "nixpkgs-master"
       }
     },
     "rotate-text": {

flake.nix

@@ -10,7 +10,9 @@
             inputs.nixpkgs.follows = "nixpkgs";
         };
         helix.url = "github:helix-editor/helix";  
-	nixos-hardware.url = "github:NixOS/nixos-hardware";  
+	nixos-hardware.url = "github:NixOS/nixos-hardware";
+
+        nixpkgs-master.url = "github:NixOS/nixpkgs/master";
     };
 
     outputs = { self, nixpkgs, home-manager, ... }@inputs: {

users/ultra/home.nix

@@ -5,6 +5,8 @@ let
       doomPrivateDir = ./doom.d;
   };
   helix = inputs.helix.packages.${pkgs.system}.default;
+  nixpkgs-master-pkgs = inputs.nixpkgs-master.legacyPackages.${pkgs.system};
+  nixpkgs-master = inputs.nixpkgs-master;
 in {
     imports = [ inputs.nix-doom-emacs.hmModule ];
     # Allow unfree packages
@@ -13,6 +15,13 @@ in {
     nixpkgs.config.permittedInsecurePackages = [
       "electron-21.4.0"
     ];
+    nixpkgs-master.config = {
+      allowUnfree = true;
+      allowUnfreePredicate = (pkg: true);
+      permittedInsecurePackages = [
+        "electron-21.4.0"
+      ];
+    };
     home = {
       username = "ultra";
       homeDirectory = "/home/ultra/";
@@ -73,6 +82,7 @@ in {
         spotify
         appimage-run
         # xivlauncher # Still fails to build :(
+        nixpkgs-master-pkgs.xivlauncher # It's fixed on master
         prismlauncher
         ghostwriter
         skypeforlinux