diff --git a/system/hosts/adsb-antenna.nix b/system/hosts/adsb-antenna.nix
index ef5c4d0..0d64ea1 100644
--- a/system/hosts/adsb-antenna.nix
+++ b/system/hosts/adsb-antenna.nix
@@ -31,12 +31,14 @@ in
         "https://attic.cache.daniel.sx/nifoc-systems?priority=1"
         "https://attic.cache.daniel.sx/nifoc-ci?priority=2"
         "https://nix-community.cachix.org?priority=3"
+        "https://cache.garnix.io?priority=4"
       ];
 
       trusted-public-keys = [
         "nifoc-systems:eDDqVP5BFR6/1KvXbF9oUL8JahDdmbrsYtxlQ57LOTU="
         "nifoc-ci:JpD9zqVQi8JuS7B8htPDOQZh08rhInMnGFS9RVhiuwk="
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+        "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
       ];
     };
 
diff --git a/system/hosts/argon.nix b/system/hosts/argon.nix
index 38a187f..dba69a5 100644
--- a/system/hosts/argon.nix
+++ b/system/hosts/argon.nix
@@ -54,12 +54,14 @@ in
         "https://attic.cache.daniel.sx/nifoc-systems?priority=1"
         "https://attic.cache.daniel.sx/nifoc-ci?priority=2"
         "https://nix-community.cachix.org?priority=3"
+        "https://cache.garnix.io?priority=4"
       ];
 
       trusted-public-keys = [
         "nifoc-systems:eDDqVP5BFR6/1KvXbF9oUL8JahDdmbrsYtxlQ57LOTU="
         "nifoc-ci:JpD9zqVQi8JuS7B8htPDOQZh08rhInMnGFS9RVhiuwk="
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+        "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
       ];
 
       trusted-users = [
diff --git a/system/hosts/mediaserver.nix b/system/hosts/mediaserver.nix
index a7f18e3..d96c9cc 100644
--- a/system/hosts/mediaserver.nix
+++ b/system/hosts/mediaserver.nix
@@ -64,12 +64,14 @@ in
         "https://attic.cache.daniel.sx/nifoc-systems?priority=1"
         "https://attic.cache.daniel.sx/nifoc-ci?priority=2"
         "https://nix-community.cachix.org?priority=3"
+        "https://cache.garnix.io?priority=4"
       ];
 
       trusted-public-keys = [
         "nifoc-systems:eDDqVP5BFR6/1KvXbF9oUL8JahDdmbrsYtxlQ57LOTU="
         "nifoc-ci:JpD9zqVQi8JuS7B8htPDOQZh08rhInMnGFS9RVhiuwk="
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+        "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
       ];
 
       trusted-users = [
diff --git a/system/hosts/neon.nix b/system/hosts/neon.nix
index 30dd6dc..60ce64d 100644
--- a/system/hosts/neon.nix
+++ b/system/hosts/neon.nix
@@ -42,12 +42,14 @@ in
         "https://attic.cache.daniel.sx/nifoc-systems?priority=1"
         "https://attic.cache.daniel.sx/nifoc-ci?priority=2"
         "https://nix-community.cachix.org?priority=3"
+        "https://cache.garnix.io?priority=4"
       ];
 
       trusted-public-keys = [
         "nifoc-systems:eDDqVP5BFR6/1KvXbF9oUL8JahDdmbrsYtxlQ57LOTU="
         "nifoc-ci:JpD9zqVQi8JuS7B8htPDOQZh08rhInMnGFS9RVhiuwk="
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+        "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
       ];
     };