diff --git a/flake.nix b/flake.nix
index ca17d82..2f6a4dd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -224,6 +224,7 @@
             ];
             users.lyrathorpe.homeModules = [
               ./home
+              ./users/lyrathorpe/home.nix
               ./home/desktop.nix
             ];
           };
@@ -245,6 +246,7 @@
             ];
             users.lyrathorpe.homeModules = [
               ./home
+              ./users/lyrathorpe/home.nix
               ./home/desktop.nix
             ];
           };
@@ -262,6 +264,7 @@
             ];
             users.lyrathorpe.homeModules = [
               ./home
+              ./users/lyrathorpe/home.nix
               ./home/desktop.nix
             ];
           };
@@ -295,7 +298,10 @@
               inputs.nixos-hardware.nixosModules.raspberry-pi-5
               ./modules/ssh.nix
             ];
-            users.lyrathorpe.homeModules = [ ./home ];
+            users.lyrathorpe.homeModules = [
+              ./home
+              ./users/lyrathorpe/home.nix
+            ];
           };
         };
 
@@ -311,6 +317,7 @@
             ];
             homeModules = [
               ./home
+              ./users/lyrathorpe/home.nix
             ];
           };
         };
diff --git a/home/shell.nix b/home/shell.nix
index ec6e421..c539dc2 100644
--- a/home/shell.nix
+++ b/home/shell.nix
@@ -341,9 +341,6 @@ in
         IdentityFile = "~/.ssh/code.emmathe.dev";
         IdentitiesOnly = true;
       };
-      "dockerpi.inf.cbg.emmaisvery.gay" = {
-        User = "emmathorpe";
-      };
     };
   };
 
diff --git a/home/sway.nix b/home/sway.nix
index b52f67a..6374608 100644
--- a/home/sway.nix
+++ b/home/sway.nix
@@ -334,13 +334,12 @@ in
     ];
   };
 
-  # Night light. Manual location (no geoclue dependency); adjust the coordinates
-  # to taste. Warmer at night, neutral by day.
+  # Night light. Manual location (no geoclue dependency); warmer at night,
+  # neutral by day. Coordinates come from the per-user module (e.g.
+  # users/lyrathorpe/home.nix), not this shared module.
   services.gammastep = {
     enable = true;
     provider = "manual";
-    latitude = 51.5;
-    longitude = -0.13; # London-ish; set to your actual location
     temperature = {
       day = 6500;
       night = 3700;
diff --git a/users/lyrathorpe/home.nix b/users/lyrathorpe/home.nix
new file mode 100644
index 0000000..572da4f
--- /dev/null
+++ b/users/lyrathorpe/home.nix
@@ -0,0 +1,17 @@
+# Lyra's personal home extras, imported on her hosts (not the work box). Keeps
+# personal data out of the shared home/ modules. See README "Users".
+{ pkgs, lib, ... }:
+{
+  # Personal ssh host shortcut.
+  programs.ssh.settings."dockerpi.inf.cbg.emmaisvery.gay" = {
+    User = "emmathorpe";
+  };
+
+  # Night-light location for gammastep (the service itself is enabled by
+  # home/sway.nix on graphical hosts). Linux-guarded so Darwin, which imports
+  # this module but has no gammastep, skips it.
+  services.gammastep = lib.mkIf pkgs.stdenv.hostPlatform.isLinux {
+    latitude = 51.5;
+    longitude = -0.13;
+  };
+}