diff --git a/dotfiles/nvim/init.lua b/dotfiles/nvim/init.lua
deleted file mode 100644
index b80b17e..0000000
--- a/dotfiles/nvim/init.lua
+++ /dev/null
@@ -1,2 +0,0 @@
--- ~/.config/nvim/init.lua
-require("neoconf")
diff --git a/dotfiles/nvim/init.lua b/dotfiles/nvim/init.lua
new file mode 120000
index 0000000..43b2144
--- /dev/null
+++ b/dotfiles/nvim/init.lua
@@ -0,0 +1 @@
+/nix/store/2cj9gk3zm43pf0xjs10pw01fz2g58jcb-home-manager-files/.config/nvim/init.lua
\ No newline at end of file
diff --git a/dotfiles/nvim/init.lua.backup b/dotfiles/nvim/init.lua.backup
new file mode 100644
index 0000000..b80b17e
--- /dev/null
+++ b/dotfiles/nvim/init.lua.backup
@@ -0,0 +1,2 @@
+-- ~/.config/nvim/init.lua
+require("neoconf")
diff --git a/flake.lock b/flake.lock
index f7da1f2..624604b 100644
--- a/flake.lock
+++ b/flake.lock
@@ -636,11 +636,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1782959384,
-        "narHash": "sha256-xnJJk+ct+D2+wdRxj1wk36w5zV9RVESwRqcklPdt3fM=",
+        "lastModified": 1783224372,
+        "narHash": "sha256-8i/87eeoqiGE4yOTjwSA3Eh/ziJRQEmd/unYU+K27sk=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "65179426c83bb3f6bc14898b42ea1c6f01d374b0",
+        "rev": "d407951447dcd00442e97087bf374aad70c04cea",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 7e89a13..47bad06 100644
--- a/flake.nix
+++ b/flake.nix
@@ -69,6 +69,7 @@
 					home-manager.useUserPackages = true;
 					home-manager.extraSpecialArgs = { inherit inputs; };
 					home-manager.users.afoucaultc = import ./home/afoucaultc/home-laptop.nix;
+                                        home-manager.backupFileExtension = "backup";
 				}
 			];
 		};
diff --git a/install.sh b/install.sh
index bf8191e..b3594ac 100755
--- a/install.sh
+++ b/install.sh
@@ -3,8 +3,6 @@
 #  Installation NixOS — choix de la machine (host)
 #  Usage :
 #     ./install.sh                 → menu interactif
-#     ./install.sh nixos-home      → poste maison
-#     ./install.sh nixos-laptop    → ThinkPad E560 (léger, faible RAM)
 # ─────────────────────────────────────────────────────────────────────
 set -euo pipefail
 export NIX_CONFIG="experimental-features = nix-command flakes"
diff --git a/rebuild.sh b/rebuild.sh
index b73599d..c9e5b9e 100755
--- a/rebuild.sh
+++ b/rebuild.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
-HOST="${1:-$(hostname)}"
-USER_HOME=$(getent passwd "${SUDO_USER:-$USER}" | cut -d: -f6)
+HOST="${1:-$(hostname)}" # trouve le host
+USER_HOME=$(getent passwd "${SUDO_USER:-$USER}" | cut -d: -f6) # récupère le path du home
 echo "→ Rebuild (sans update) : $HOST"
 sudo nixos-rebuild switch --flake "path:$USER_HOME/nixos-config#$HOST"
diff --git a/update.sh b/update.sh
index 740d3cf..74cae95 100755
--- a/update.sh
+++ b/update.sh
@@ -1,6 +1,5 @@
 #!/usr/bin/env bash
 # Usage : ./update.sh [nixos-home|nixos-laptop]
-# Sans argument → détecte le host courant via le hostname.
 set -euo pipefail
 HOST="${1:-$(hostname)}"
 echo "→ Mise à jour du host : $HOST"