diff --git a/modules/common.nix b/modules/common.nix
new file mode 100644
index 0000000..a860eb3
--- /dev/null
+++ b/modules/common.nix
@@ -0,0 +1,11 @@
+{
+  ...
+}: {
+    defaultSSHKeys = [
+      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIDsb/Tr69YN5MQLweWPuJaRGm+h2kOyxfD6sqKEDTIwoAAAABHNzaDo= harald@fedora.fritz.box"
+      "sk-ecdsa-sha2-nistp256@openssh.com AAAAInNrLWVjZHNhLXNoYTItbmlzdHAyNTZAb3BlbnNzaC5jb20AAAAIbmlzdHAyNTYAAABBBACLgT81iB1iWWVuXq6PdQ5GAAGhaZhSKnveQCvcNnAOZ5WKH80bZShKHyAYzrzbp8IGwLWJcZQ7TqRK+qZdfagAAAAEc3NoOg== harald@hoyer.xyz"
+      "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBAYbUTKpy4QR3s944/hjJ1UK05asFEs/SmWeUbtS0cdA660sT4xHnRfals73FicOoz+uIucJCwn/SCM804j+wtM="
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMNsmP15vH8BVKo7bdvIiiEjiQboPGcRPqJK0+bH4jKD harald@lenovo.fritz.box"
+      "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEd2N6QSpuAXOXmSN5p2MPKyWe+oT5ayMBoRN3rCz/FS6ZI8PG2tntEte8+hkW7X0vA2dtB3aj2jWbqUJoQ8wKs="
+    ];
+}
diff --git a/modules/darwin/user/default.nix b/modules/darwin/user/default.nix
index 2dcf664..74c0596 100644
--- a/modules/darwin/user/default.nix
+++ b/modules/darwin/user/default.nix
@@ -4,29 +4,24 @@
   pkgs,
   ...
 }:
+with lib;
+with lib.metacfg;
 let
-  inherit (lib) types mkIf mkDefault;
-  inherit (lib.metacfg) mkOpt;
-
+  common = import ../../common.nix {};
   cfg = config.metacfg.user;
 
   is-linux = pkgs.stdenv.isLinux;
   is-darwin = pkgs.stdenv.isDarwin;
 in
 {
-  options.metacfg.user = {
+  options.metacfg.user =  with types; {
     name = mkOpt types.str "harald" "The user account.";
 
     fullName = mkOpt types.str "Harald Hoyer" "The full name of the user.";
     email = mkOpt types.str "harald@hoyer.xyz" "The email of the user.";
 
     uid = mkOpt (types.nullOr types.int) 501 "The uid for the user account.";
-    sshKeys = mkOpt (types.listOf types.str) [
-      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIDsb/Tr69YN5MQLweWPuJaRGm+h2kOyxfD6sqKEDTIwoAAAABHNzaDo= harald@fedora.fritz.box"
-      "sk-ecdsa-sha2-nistp256@openssh.com AAAAInNrLWVjZHNhLXNoYTItbmlzdHAyNTZAb3BlbnNzaC5jb20AAAAIbmlzdHAyNTYAAABBBACLgT81iB1iWWVuXq6PdQ5GAAGhaZhSKnveQCvcNnAOZ5WKH80bZShKHyAYzrzbp8IGwLWJcZQ7TqRK+qZdfagAAAAEc3NoOg== harald@hoyer.xyz"
-      "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBAYbUTKpy4QR3s944/hjJ1UK05asFEs/SmWeUbtS0cdA660sT4xHnRfals73FicOoz+uIucJCwn/SCM804j+wtM="
-      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMNsmP15vH8BVKo7bdvIiiEjiQboPGcRPqJK0+bH4jKD harald@lenovo.fritz.box"
-    ] "ssh keys";
+    sshKeys = mkOpt (listOf str) common.defaultSSHKeys "ssh keys";
   };
 
   config = {
diff --git a/modules/nixos/user/default.nix b/modules/nixos/user/default.nix
index f0c531e..807cca4 100644
--- a/modules/nixos/user/default.nix
+++ b/modules/nixos/user/default.nix
@@ -8,6 +8,7 @@
 with lib;
 with lib.metacfg;
 let
+  common = import ../../common.nix {};
   cfg = config.metacfg.user;
   defaultIconFileName = "profile.jpg";
   defaultIcon = pkgs.stdenvNoCC.mkDerivation {
@@ -49,13 +50,7 @@ in
     icon = mkOpt (nullOr package) defaultIcon "The profile picture to use for the user.";
     prompt-init = mkBoolOpt true "Whether or not to show an initial message when opening a new shell.";
     extraGroups = mkOpt (listOf str) [ ] "Groups for the user to be assigned.";
-    sshKeys = mkOpt (listOf str) [
-      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIDsb/Tr69YN5MQLweWPuJaRGm+h2kOyxfD6sqKEDTIwoAAAABHNzaDo= harald@fedora.fritz.box"
-      "sk-ecdsa-sha2-nistp256@openssh.com AAAAInNrLWVjZHNhLXNoYTItbmlzdHAyNTZAb3BlbnNzaC5jb20AAAAIbmlzdHAyNTYAAABBBACLgT81iB1iWWVuXq6PdQ5GAAGhaZhSKnveQCvcNnAOZ5WKH80bZShKHyAYzrzbp8IGwLWJcZQ7TqRK+qZdfagAAAAEc3NoOg== harald@hoyer.xyz"
-      "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBAYbUTKpy4QR3s944/hjJ1UK05asFEs/SmWeUbtS0cdA660sT4xHnRfals73FicOoz+uIucJCwn/SCM804j+wtM="
-      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMNsmP15vH8BVKo7bdvIiiEjiQboPGcRPqJK0+bH4jKD harald@lenovo.fritz.box"
-      "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEd2N6QSpuAXOXmSN5p2MPKyWe+oT5ayMBoRN3rCz/FS6ZI8PG2tntEte8+hkW7X0vA2dtB3aj2jWbqUJoQ8wKs="
-    ] "ssh keys";
+    sshKeys = mkOpt (listOf str) common.defaultSSHKeys "ssh keys";
     extraOptions = mkOpt attrs { } (mdDoc "Extra options passed to `users.users.<name>`.");
   };