iconpack-obsidian: fix broken symlink (#444154)

pkgs/by-name/ic/iconpack-obsidian/package.nix

@@ -31,12 +31,28 @@ stdenvNoCC.mkDerivation rec {
   dontDropIconThemeCache = true;
 
   installPhase = ''
+    runHook preInstall
+
     mkdir -p $out/share/icons
     mv Obsidian* $out/share/icons
 
     for theme in $out/share/icons/*; do
       gtk-update-icon-cache $theme
     done
+
+    # Fix broken symlink only if needed
+    # https://github.com/NixOS/nixpkgs/issues/394218
+
+    broken_symlink="$out/share/icons/Obsidian/actions/96/lock.svg"
+    target_svg="$out/share/icons/Obsidian/actions/scalable/system-lock-screen.svg"
+
+    if [ -h "$broken_symlink" ] && [ ! -e "$broken_symlink" ]; then
+      echo "=== Fixing broken symlink: $broken_symlink"
+      rm -f "$broken_symlink"
+      ln -s "$target_svg" "$broken_symlink"
+    fi
+
+    runHook postInstall
   '';
 
   meta = with lib; {