diff --git a/nixos/home/danny/home.nix b/nixos/home/danny/home.nix
index f2b4384..91fd887 100644
--- a/nixos/home/danny/home.nix
+++ b/nixos/home/danny/home.nix
@@ -150,10 +150,12 @@
 
   # Writable copy (not a symlink to the store — cp in the sync script must replace a real file).
   home.activation.alacrittySystemTheme = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
-    MOCHA="${config.xdg.configHome}/alacritty/catppuccin-mocha-colors.toml"
+    MOCHA="${../../../assets/alacritty/catppuccin-mocha-colors.toml}"
     ACTIVE="${config.xdg.configHome}/alacritty/active-colors.toml"
+    $DRY_RUN_CMD mkdir -p "${config.xdg.configHome}/alacritty"
     if [ ! -f "$ACTIVE" ]; then
       $DRY_RUN_CMD cp "$MOCHA" "$ACTIVE"
+      $DRY_RUN_CMD chmod 0644 "$ACTIVE"
     fi
     $DRY_RUN_CMD ${pkgs.bash}/bin/bash "${../../../scripts/alacritty-sync-system-theme.sh}" || true
   '';
diff --git a/scripts/alacritty-sync-system-theme.sh b/scripts/alacritty-sync-system-theme.sh
old mode 100644
new mode 100755
index 5e03a94..2238ef5
--- a/scripts/alacritty-sync-system-theme.sh
+++ b/scripts/alacritty-sync-system-theme.sh
@@ -26,15 +26,16 @@ else
   want="light"
 fi
 
-if [[ -f "$MARKER" ]] && [[ "$(tr -d '\n' <"$MARKER")" == "$want" ]]; then
-  exit 0
-fi
-
 mkdir -p "$ALACRITTY_DIR"
 printf '%s' "$want" >"$MARKER"
 
 if [[ "$want" == "light" ]]; then
-  cp "$LIGHT" "$ACTIVE"
+  tmp="$(mktemp "$ALACRITTY_DIR/active-colors.toml.XXXXXX")"
+  cp "$LIGHT" "$tmp"
 else
-  cp "$DARK" "$ACTIVE"
+  tmp="$(mktemp "$ALACRITTY_DIR/active-colors.toml.XXXXXX")"
+  cp "$DARK" "$tmp"
 fi
+
+chmod 0644 "$tmp"
+mv -f "$tmp" "$ACTIVE"