diff --git a/.github/workflows/check.yaml b/.github/workflows/check.yaml
index dc07cce..ffefc47 100644
--- a/.github/workflows/check.yaml
+++ b/.github/workflows/check.yaml
@@ -36,4 +36,4 @@ jobs:
         #   --impure
         # --show-trace
         # run: NIXPKGS_ALLOW_INSECURE=1 nix flake check --no-build --accept-flake-config --impure
-        run: NIXPKGS_ALLOW_INSECURE=1 nix flake check --impure
+        run: NIXPKGS_ALLOW_INSECURE=1 nix flake check --accept-flake-config --impure
diff --git a/flake.nix b/flake.nix
index c2b67da..3a5409e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -205,12 +205,18 @@
       # packages.${system} = import ./pkgs nixpkgs.legacyPackages.${system};
     };
 
-  # nixConfig = {
-  #   extra-substituters = [
-  #     "https://wezterm.cachix.org"
-  #   ];
-  #   extra-trusted-public-keys = [
-  #     "wezterm.cachix.org-1:kAbhjYUC9qvblTE+s7S+kl5XM1zVa4skO+E/1IDWdH0="
-  #   ];
-  # };
+  nixConfig = {
+    extra-substituters = [
+      "https://nix-community.cachix.org"
+      "https://helix.cachix.org"
+      "https://wezterm.cachix.org"
+      "https://cuda-maintainers.cachix.org"
+    ];
+    extra-trusted-public-keys = [
+      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+      "helix.cachix.org-1:ejp9KQpR1FBI2onstMQ34yogDm4OgU2ru6lIwPvuCVs="
+      "wezterm.cachix.org-1:kAbhjYUC9qvblTE+s7S+kl5XM1zVa4skO+E/1IDWdH0="
+      "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
+    ];
+  };
 }
diff --git a/modules/home-manager/server/nix-utils.nix b/modules/home-manager/server/nix-utils.nix
index 3cc230b..8a95971 100644
--- a/modules/home-manager/server/nix-utils.nix
+++ b/modules/home-manager/server/nix-utils.nix
@@ -61,14 +61,14 @@ in
           "flakes"
           # "pipe-operators"
         ];
-        extra-substituters = [
-          "https://helix.cachix.org"
-          "https://wezterm.cachix.org"
-        ];
-        extra-trusted-public-keys = [
-          "helix.cachix.org-1:ejp9KQpR1FBI2onstMQ34yogDm4OgU2ru6lIwPvuCVs="
-          "wezterm.cachix.org-1:kAbhjYUC9qvblTE+s7S+kl5XM1zVa4skO+E/1IDWdH0="
-        ];
+        # extra-substituters = [
+        #   "https://helix.cachix.org"
+        #   "https://wezterm.cachix.org"
+        # ];
+        # extra-trusted-public-keys = [
+        #   "helix.cachix.org-1:ejp9KQpR1FBI2onstMQ34yogDm4OgU2ru6lIwPvuCVs="
+        #   "wezterm.cachix.org-1:kAbhjYUC9qvblTE+s7S+kl5XM1zVa4skO+E/1IDWdH0="
+        # ];
       };
       extraOptions = ''
         trusted-users = root ${user}
diff --git a/modules/nixos/system/nix-utils.nix b/modules/nixos/system/nix-utils.nix
index 19a138c..b28aea5 100644
--- a/modules/nixos/system/nix-utils.nix
+++ b/modules/nixos/system/nix-utils.nix
@@ -37,16 +37,16 @@
           "flakes"
           "pipe-operators"
         ];
-        extra-substituters = [
-          "https://nix-community.cachix.org"
-          "https://helix.cachix.org"
-          "https://wezterm.cachix.org"
-        ];
-        extra-trusted-public-keys = [
-          "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-          "helix.cachix.org-1:ejp9KQpR1FBI2onstMQ34yogDm4OgU2ru6lIwPvuCVs="
-          "wezterm.cachix.org-1:kAbhjYUC9qvblTE+s7S+kl5XM1zVa4skO+E/1IDWdH0="
-        ];
+        # extra-substituters = [
+        #   "https://nix-community.cachix.org"
+        #   "https://helix.cachix.org"
+        #   "https://wezterm.cachix.org"
+        # ];
+        # extra-trusted-public-keys = [
+        #   "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+        #   "helix.cachix.org-1:ejp9KQpR1FBI2onstMQ34yogDm4OgU2ru6lIwPvuCVs="
+        #   "wezterm.cachix.org-1:kAbhjYUC9qvblTE+s7S+kl5XM1zVa4skO+E/1IDWdH0="
+        # ];
       };
       # extraOptions = ''
       #   trusted-users = root ${username}
diff --git a/modules/nixos/system/nvidia/default.nix b/modules/nixos/system/nvidia/default.nix
index 91f2a4d..91dbc1a 100644
--- a/modules/nixos/system/nvidia/default.nix
+++ b/modules/nixos/system/nvidia/default.nix
@@ -8,14 +8,14 @@
   options.hosts.nvidia.enable = lib.mkEnableOption "Setup Nvidia environment";
 
   config = lib.mkIf config.hosts.nvidia.enable {
-    nix.settings = {
-      extra-substituters = [
-        "https://cuda-maintainers.cachix.org"
-      ];
-      extra-trusted-public-keys = [
-        "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
-      ];
-    };
+    # nix.settings = {
+    #   extra-substituters = [
+    #     "https://cuda-maintainers.cachix.org"
+    #   ];
+    #   extra-trusted-public-keys = [
+    #     "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
+    #   ];
+    # };
 
     # Latest kernel does not work well with some web browsers...
     boot.kernelPackages = pkgs.linuxPackages;