diff --git a/nixos/modules/borgbackup.nix b/nixos/modules/borgbackup.nix
index b552c8b..08724cc 100644
--- a/nixos/modules/borgbackup.nix
+++ b/nixos/modules/borgbackup.nix
@@ -48,6 +48,13 @@ in {
           path = "/var/lib/backups/cthulhu";
           allowSubRepos = true;
         };
+        dagon = {
+          authorizedKeysAppendOnly = [
+            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJaTBennwqT9eB43gVD1nM1os3dMPZ8RWwIKPEjqMK5V Dagon Backup"
+          ];
+          path = "/var/lib/backups/dagon";
+          allowSubRepos = true;
+        };
         eihort = {
           authorizedKeysAppendOnly = [
             "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHLoDxtY4Tp6NKxLt9oHmWT6w4UpU6eA1TnPU2Ut83BN Eihort Backup"
diff --git a/nixos/roles/admins.nix b/nixos/roles/admins.nix
index 7b8c524..1bc6d4c 100644
--- a/nixos/roles/admins.nix
+++ b/nixos/roles/admins.nix
@@ -3,28 +3,21 @@ with lib; let
   admins = {
     nerf = {
       hashedPassword = "$y$j9T$SJcjUIcs3JYuM5oyxfEQa/$tUBQT07FK4cb9xm.A6ZKVnFIPNOYMOKC6Dt6hadCuJ7";
-      sshKeys = [
+      keys = [
         "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEdA4LpEGUUmN8esFyrNZXFb2GiBID9/S6zzhcnofQuP nerf@nerflap2"
       ];
-      nixKeys = [
-        "nerflap2-1:pDZCg0oo9PxNQxwVSQSvycw7WXTl53PGvVeZWvxuqJc="
-      ];
     };
     gonne = {
       hashedPassword = "$6$EtGpHEcFkOi0yUWp$slXf0CvIUrhdqaoCrQ5YwtYu2IVuE1RGGst4fnDPRLWVm.lYx0ruvSAF2/vw/sLbW37ORJjlb0NHQ.kSG7cVY/";
-      sshKeys = [
+      keys = [
         "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIAhwkSDISCWLN2GhHfxdZsVkK4J7JoEcPwtNbAesb+BZAAAABHNzaDo= Gonne"
       ];
-      nixKeys = [
-        "gonne.mathebau.de-1:FsXFyFiBFE/JxC9MCkt/WuiXjx5dkRI9RXj0FxOQrV0="
-      ];
     };
   };
 
   mkAdmin = name: {
     hashedPassword,
-    sshKeys,
-    ...
+    keys,
   }: {
     "${name}" = {
       isNormalUser = true;
@@ -32,12 +25,10 @@ with lib; let
       extraGroups = ["wheel"];
       group = "users";
       home = "/home/${name}";
-      openssh.authorizedKeys = {keys = sshKeys;};
+      openssh.authorizedKeys = {inherit keys;};
       inherit hashedPassword;
     };
   };
-  mkNixKeys = _: {nixKeys, ...}: nixKeys;
 in {
   users.users = mkMerge (mapAttrsToList mkAdmin admins);
-  nix.settings.trusted-public-keys = lists.concatLists (mapAttrsToList mkNixKeys admins);
 }
diff --git a/nixos/roles/default.nix b/nixos/roles/default.nix
index 851db7c..2936ac3 100644
--- a/nixos/roles/default.nix
+++ b/nixos/roles/default.nix
@@ -5,11 +5,18 @@
 }: {
   imports = [
     ./admins.nix
-    ./nix.nix
+    ./nix_keys.nix
     ./prometheusNodeExporter.nix
     ../modules/impermanence.nix
   ];
 
+  nix = {
+    extraOptions = ''
+      experimental-features = nix-command flakes
+      builders-use-substitutes = true
+    '';
+  };
+
   networking = {
     firewall = {
       # these shoud be default, but better make sure!
diff --git a/nixos/roles/nix.nix b/nixos/roles/nix.nix
deleted file mode 100644
index 543ac7d..0000000
--- a/nixos/roles/nix.nix
+++ /dev/null
@@ -1,22 +0,0 @@
-{
-  nix = {
-    settings = {
-      # trusted-public-keys belonging to specific persons are set in rolse/admins.nix
-      trusted-public-keys = [];
-      experimental-features = [
-        "flakes"
-        "nix-command"
-      ];
-      auto-optimise-store = true;
-      fallback = true;
-      builders-use-substitutes = true;
-    };
-    gc = {
-      automatic = true;
-      persistent = false;
-      dates = "weekly";
-      options = "-d";
-      randomizedDelaySec = "5h";
-    };
-  };
-}
diff --git a/nixos/roles/nix_keys.nix b/nixos/roles/nix_keys.nix
new file mode 100644
index 0000000..97e5dc5
--- /dev/null
+++ b/nixos/roles/nix_keys.nix
@@ -0,0 +1,7 @@
+{
+  imports = [];
+  nix.settings.trusted-public-keys = [
+    "nerflap2-1:pDZCg0oo9PxNQxwVSQSvycw7WXTl53PGvVeZWvxuqJc="
+    "gonne.mathebau.de-1:FsXFyFiBFE/JxC9MCkt/WuiXjx5dkRI9RXj0FxOQrV0="
+  ];
+}