diff --git a/modules/nixos/community-builder/keys/matthiasbeyer b/modules/nixos/community-builder/keys/matthiasbeyer
new file mode 100644
index 0000000..6de3cce
--- /dev/null
+++ b/modules/nixos/community-builder/keys/matthiasbeyer
@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHCUxQenEQjmGC6UckOWGXdZN7J8rVG6l5IoaJ176o+N nix community key
diff --git a/modules/nixos/community-builder/users.nix b/modules/nixos/community-builder/users.nix
index daa787d..6cc1765 100644
--- a/modules/nixos/community-builder/users.nix
+++ b/modules/nixos/community-builder/users.nix
@@ -36,6 +36,11 @@ let
 
     schmittlauch.keys = ./keys/schmittlauch;
 
+    matthiasbeyer = {
+      trusted = false;
+      keys = ./keys/matthiasbeyer;
+    };
+
     stephank.keys = ./keys/stephank;
 
     winter.keys = ./keys/winter;