diff --git a/system/hosts/Styx.nix b/system/hosts/Styx.nix
index 24fed58..f2614af 100644
--- a/system/hosts/Styx.nix
+++ b/system/hosts/Styx.nix
@@ -7,10 +7,12 @@
   nix = {
     binaryCaches = [
       "https://nix-community.cachix.org"
+      "https://nifoc.cachix.org"
     ];
 
     binaryCachePublicKeys = [
       "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+      "nifoc.cachix.org-1:ymuftq7RgN/lf/iWXFK8gpwDSAGFaGBeliWe9u6q8II="
     ];
 
     trustedUsers = [
diff --git a/system/hosts/adsb-antenna.nix b/system/hosts/adsb-antenna.nix
index 3a869bd..d10c331 100644
--- a/system/hosts/adsb-antenna.nix
+++ b/system/hosts/adsb-antenna.nix
@@ -23,10 +23,12 @@ in
 
       substituters = [
         "https://nix-community.cachix.org"
+        "https://nifoc.cachix.org"
       ];
 
       trusted-public-keys = [
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+        "nifoc.cachix.org-1:ymuftq7RgN/lf/iWXFK8gpwDSAGFaGBeliWe9u6q8II="
       ];
     };
 
diff --git a/system/hosts/sail.nix b/system/hosts/sail.nix
index a3d68b2..e41c913 100644
--- a/system/hosts/sail.nix
+++ b/system/hosts/sail.nix
@@ -24,10 +24,12 @@ in
 
       substituters = [
         "https://nix-community.cachix.org"
+        "https://nifoc.cachix.org"
       ];
 
       trusted-public-keys = [
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+        "nifoc.cachix.org-1:ymuftq7RgN/lf/iWXFK8gpwDSAGFaGBeliWe9u6q8II="
       ];
     };