diff --git a/nixos-modules/nix/default.nix b/nixos-modules/nix/default.nix
index 4ae3d9a..a7986d7 100644
--- a/nixos-modules/nix/default.nix
+++ b/nixos-modules/nix/default.nix
@@ -23,12 +23,10 @@ in
         substituters = lib.mkForce [
           "https://cache.nixos.org"
           "https://nix-community.cachix.org"
-          "https://cache.missing.ninja"
         ];
         trusted-public-keys = lib.mkForce [
           "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
           "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-          "cache.missing.ninja:mgKmyHDWgL+xBp0aANrin807jWYu/fpMojKNb7KQDXg="
         ];
         sandbox = true;
         require-sigs = true;