diff --git a/modules/home/backtest/default.nix b/modules/home/backtest/default.nix
index 794c803..46cf6ee 100644
--- a/modules/home/backtest/default.nix
+++ b/modules/home/backtest/default.nix
@@ -3,14 +3,14 @@
   pkgs,
   ...
 }: {
-  home.packages = [inputs.backtest.packages.${pkgs.system}.default];
+  home.packages = [inputs.backtest.packages.${pkgs.stdenv.hostPlatform.system}.default];
 
   systemd.user.services.backtest = {
     Unit.Description = "Backtest Streamlit dashboard";
     Unit.After = ["network.target"];
     Service = {
-      ExecStart = "${inputs.backtest.packages.${pkgs.system}.default}/bin/backtest --server.port 8501";
-      WorkingDirectory = "${inputs.backtest.packages.${pkgs.system}.default}/lib";
+      ExecStart = "${inputs.backtest.packages.${pkgs.stdenv.hostPlatform.system}.default}/bin/backtest --server.port 8501";
+      WorkingDirectory = "${inputs.backtest.packages.${pkgs.stdenv.hostPlatform.system}.default}/lib";
       Restart = "on-failure";
       RestartSec = "5s";
     };
diff --git a/modules/home/gtk/default.nix b/modules/home/gtk/default.nix
index 9eab489..5abfbef 100644
--- a/modules/home/gtk/default.nix
+++ b/modules/home/gtk/default.nix
@@ -59,6 +59,8 @@ in {
 
   catppuccin = {
     enable = true;
+    # explicite : catppuccin/nix va basculer l'auto-enrôlement sur autoEnable
+    autoEnable = true;
     flavor = "mocha";
     accent = "lavender";
     cursors.enable = true;
@@ -75,6 +77,8 @@ in {
     iconTheme.package = lib.mkDefault pkgs.papirus-icon-theme;
     gtk3.extraConfig.gtk-application-prefer-dark-theme = 1;
     gtk4.extraConfig.gtk-application-prefer-dark-theme = 1;
+    # comportement historique (stateVersion < 26.05) : GTK4 suit le thème GTK
+    gtk4.theme = config.gtk.theme;
   };
 
   qt = {
diff --git a/modules/home/option-pricer/default.nix b/modules/home/option-pricer/default.nix
index 974a301..ba585fe 100644
--- a/modules/home/option-pricer/default.nix
+++ b/modules/home/option-pricer/default.nix
@@ -3,13 +3,13 @@
   pkgs,
   ...
 }: {
-  home.packages = [inputs.option-pricer.packages.${pkgs.system}.default];
+  home.packages = [inputs.option-pricer.packages.${pkgs.stdenv.hostPlatform.system}.default];
   systemd.user.services.option-pricer = {
     Unit.Description = "option-pricer Streamlit dashboard";
     Unit.After = ["network.target"];
     Service = {
-      ExecStart = "${inputs.option-pricer.packages.${pkgs.system}.default}/bin/option-pricer --server.port 8503";
-      WorkingDirectory = "${inputs.option-pricer.packages.${pkgs.system}.default}/lib/option-pricer";
+      ExecStart = "${inputs.option-pricer.packages.${pkgs.stdenv.hostPlatform.system}.default}/bin/option-pricer --server.port 8503";
+      WorkingDirectory = "${inputs.option-pricer.packages.${pkgs.stdenv.hostPlatform.system}.default}/lib/option-pricer";
       Restart = "on-failure";
       RestartSec = "5s";
     };
diff --git a/modules/home/portfolio-optimizer/default.nix b/modules/home/portfolio-optimizer/default.nix
index b77a9c7..4b4688b 100644
--- a/modules/home/portfolio-optimizer/default.nix
+++ b/modules/home/portfolio-optimizer/default.nix
@@ -3,14 +3,14 @@
   pkgs,
   ...
 }: {
-  home.packages = [inputs.portfolio-optimizer.packages.${pkgs.system}.default];
+  home.packages = [inputs.portfolio-optimizer.packages.${pkgs.stdenv.hostPlatform.system}.default];
 
   systemd.user.services.portfolio-optimizer = {
     Unit.Description = "portfolio-optimizer Streamlit dashboard";
     Unit.After = ["network.target"];
     Service = {
-      ExecStart = "${inputs.portfolio-optimizer.packages.${pkgs.system}.default}/bin/portfolio-optimizer --server.port 8502";
-      WorkingDirectory = "${inputs.portfolio-optimizer.packages.${pkgs.system}.default}/lib";
+      ExecStart = "${inputs.portfolio-optimizer.packages.${pkgs.stdenv.hostPlatform.system}.default}/bin/portfolio-optimizer --server.port 8502";
+      WorkingDirectory = "${inputs.portfolio-optimizer.packages.${pkgs.stdenv.hostPlatform.system}.default}/lib";
       Restart = "on-failure";
       RestartSec = "5s";
     };
diff --git a/modules/home/zsh/default.nix b/modules/home/zsh/default.nix
index 07f3380..d01ce97 100644
--- a/modules/home/zsh/default.nix
+++ b/modules/home/zsh/default.nix
@@ -1,4 +1,8 @@
-{pkgs, ...}: let
+{
+  config,
+  pkgs,
+  ...
+}: let
   shellAliases = import ./aliases.nix;
 in {
   home.packages = with pkgs; [
@@ -9,6 +13,8 @@ in {
 
   programs.zsh = {
     enable = true;
+    # garde .zshrc dans ~ (défaut historique, stateVersion < 26.05)
+    dotDir = config.home.homeDirectory;
     enableCompletion = true;
     initContent = builtins.readFile ./profile.sh;
 
diff --git a/users/marc/packages.nix b/users/marc/packages.nix
index 11394e7..9b2d46e 100644
--- a/users/marc/packages.nix
+++ b/users/marc/packages.nix
@@ -186,7 +186,7 @@ in {
     wg-netmanager
     openvpn
     openvpn3
-    protonvpn-gui
+    proton-vpn
     tor-browser
     ungoogled-chromium
     netsurf-browser