diff --git a/flake.lock b/flake.lock
index 29dfa51..05eff3a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -34,11 +34,11 @@
     },
     "nixlib": {
       "locked": {
-        "lastModified": 1693701915,
-        "narHash": "sha256-waHPLdDYUOHSEtMKKabcKIMhlUOHPOOPQ9UyFeEoovs=",
+        "lastModified": 1708821942,
+        "narHash": "sha256-jd+E1SD59qty65pwqad2mftzkT6vW5nNFWVuvayh4Zw=",
         "owner": "nix-community",
         "repo": "nixpkgs.lib",
-        "rev": "f5af57d3ef9947a70ac86e42695231ac1ad00c25",
+        "rev": "479831ed8b3c9c7b80533999f880c7d0bf6a491b",
         "type": "github"
       },
       "original": {
@@ -55,11 +55,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1706085261,
-        "narHash": "sha256-7PgpHRHyShINcqgevPP1fJ6N8kM5ZSOJnk3QZBrOCQ0=",
+        "lastModified": 1708940320,
+        "narHash": "sha256-QOWRJlqT5FRESiaO42/QV/GbSRNKSa4XUDs3cNQsoWI=",
         "owner": "nix-community",
         "repo": "nixos-generators",
-        "rev": "896f6589db5b25023b812bbb6c1f5d3a499b1132",
+        "rev": "5b7772406956f95e8a0e1f27218b1e7cf6e9164a",
         "type": "github"
       },
       "original": {
@@ -70,11 +70,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1706306662,
-        "narHash": "sha256-CVeZHdqbJ63Z+2l9FNcje6AfTdG4Y3WbFHuEn0RFUl0=",
+        "lastModified": 1708905176,
+        "narHash": "sha256-pphkt8iO8CV/TugI7bsPOvFzi5mRSifkEQiwqYBK28s=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "11d4781721d16e949fbd61f67bc6b09341b7bfc6",
+        "rev": "227a4c47bef2390a7925693c51489e84169b1957",
         "type": "github"
       },
       "original": {
@@ -130,13 +130,29 @@
         "type": "indirect"
       }
     },
-    "nixpkgs-unstable": {
+    "nixpkgs-master": {
       "locked": {
-        "lastModified": 1706275741,
-        "narHash": "sha256-53O2JHFdDTWHzTfLkZRAZVAk9ntChFhcTTnAtj6bJKE=",
+        "lastModified": 1708963602,
+        "narHash": "sha256-ODloNfAj9CUN44L1VEvjh5nwV6pseDUZ3/lI6IgYUeo=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "7ac72b3ee2af9bab80d66addd9b237277cc975c5",
+        "rev": "cd2ec848a90ffdbe716c8829e6c4f75406c5b1a3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "master",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1708954320,
+        "narHash": "sha256-n3LXNMlz7ORCjfIrIUo19a844Fec2+yg7k6NspdVCxs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "94cda73bf2fd675de987db7c3ac81e861b892266",
         "type": "github"
       },
       "original": {
@@ -166,6 +182,7 @@
         "nixos-generators": "nixos-generators",
         "nixpkgs": "nixpkgs",
         "nixpkgs-23-05": "nixpkgs-23-05",
+        "nixpkgs-master": "nixpkgs-master",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "simple-nixos-mailserver": "simple-nixos-mailserver"
       }
diff --git a/flake.nix b/flake.nix
index 585b96e..c789cbb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,6 +2,7 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11-small";
     nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable-small";
+    nixpkgs-master.url = "github:NixOS/nixpkgs/master";
     nixpkgs-23-05.url = "github:NixOS/nixpkgs/nixos-23.05-small";
     nixos-generators = {
       url = "github:nix-community/nixos-generators";
@@ -10,7 +11,7 @@
     simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-23.11";
   };
 
-  outputs = { self, nixpkgs, nixpkgs-unstable, nixpkgs-23-05, nixos-generators, simple-nixos-mailserver, ... }@inputs:
+  outputs = { self, nixpkgs, nixpkgs-unstable, nixpkgs-master, nixpkgs-23-05, nixos-generators, simple-nixos-mailserver, ... }@inputs:
   let
     hosts = import ./hosts.nix inputs;
     helper = import ./helper.nix inputs;
@@ -28,7 +29,7 @@
         nodeNixpkgs = builtins.mapAttrs (name: host: host.pkgs) hosts;
 
         specialArgs = {
-          inherit nixpkgs-unstable hosts simple-nixos-mailserver;
+          inherit nixpkgs-unstable nixpkgs-master hosts simple-nixos-mailserver;
 
           # Provide environment for secret key command
           keyCommandEnv = [ "env" "GNUPGHOME=/home/yuri/.passinfra_gnupg" "PASSWORD_STORE_DIR=/home/yuri/pass/infra" ];
@@ -38,7 +39,7 @@
 
     hydraJobs = {
       nixConfigurations = builtins.mapAttrs (host: helper.generateNixConfiguration host {
-        inherit nixpkgs-unstable hosts simple-nixos-mailserver;
+        inherit nixpkgs-unstable nixpkgs-master hosts simple-nixos-mailserver;
       }) hosts;
     };