diff --git a/flake.nix b/flake.nix
index d701fa5..2d0e291 100644
--- a/flake.nix
+++ b/flake.nix
@@ -124,16 +124,19 @@
   };
 
   nixConfig = {
-    # matches ./profiles/base/binary-caches.nix
+    # ./profiles/base/binary-caches.nix | jq '.nix.settings.substituters[]'
     extra-substituters = [
-      "https://nix-community.cachix.org/"
-      # "https://numtide.cachix.org/" # dead? https://github.com/numtide/nixpkgs-unfree/commit/399ae17bda97a0318a0c5316edb169d097a776dc
-      "https://cache.flox.dev/?priority=45" # https://flox.dev/blog/flox-the-nix-foundation-and-nvidia-partner-for-cuda/
+      "https://cache.flox.dev/?priority=60"
+      "https://cache.nixos-cuda.org?priority=45"
+      "https://cache.nixos.org/"
+      "https://nix-community.cachix.org/?priority=50"
     ];
+    # ./profiles/base/binary-caches.nix | jq '.nix.settings."trusted-public-keys"[]'
     extra-trusted-public-keys = [
-      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-      # "numtide.cachix.org-1:2ps1kLBUWjxIneOy1Ik6cQjb41X0iXVXeHigGmycPPE="
       "flox-cache-public-1:7F4OyH7ZCnFhcze3fJdfyXYLQw/aV7GEed86nQ7IsOs="
+      "cache.nixos-cuda.org:74DUi4Ye579gUqzH4ziL9IyiJBlDpMRn9MBN8oNan9M="
+      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
     ];
   };
 
diff --git a/profiles/base/binary-caches.nix b/profiles/base/binary-caches.nix
index 44732f0..21a0138 100644
--- a/profiles/base/binary-caches.nix
+++ b/profiles/base/binary-caches.nix
@@ -11,19 +11,24 @@ let
     ];
 
     # https://nix-community.cachix.org/nix-cache-info (WantMassQuery: 1, priority: 41)
-    "https://nix-community.cachix.org/" = [
+    "https://nix-community.cachix.org/?priority=50" = [
       "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
     ];
 
+    # https://wiki.nixos.org/wiki/CUDA (WantMassQuery: 1, Priority: 50)
+    "https://cache.nixos-cuda.org?priority=45" = [
+      "cache.nixos-cuda.org:74DUi4Ye579gUqzH4ziL9IyiJBlDpMRn9MBN8oNan9M="
+    ];
+
     # # dead? https://github.com/numtide/nixpkgs-unfree/commit/399ae17bda97a0318a0c5316edb169d097a776dc
     # # https://numtide.cachix.org/nix-cache-info (WantMassQuery: 1, priority: 41)
-    # "https://numtide.cachix.org/" = [
+    # "https://numtide.cachix.org/?priority=55" = [
     #   "numtide.cachix.org-1:2ps1kLBUWjxIneOy1Ik6cQjb41X0iXVXeHigGmycPPE="
     # ];
 
     # https://flox.dev/blog/flox-the-nix-foundation-and-nvidia-partner-for-cuda/
     # https://cache.flox.dev/nix-cache-info (no WantMassQuery, no priority(!!!))
-    "https://cache.flox.dev/?priority=45" = [
+    "https://cache.flox.dev/?priority=60" = [
       "flox-cache-public-1:7F4OyH7ZCnFhcze3fJdfyXYLQw/aV7GEed86nQ7IsOs="
     ];