diff --git a/recipes/harfbuzz.toml b/recipes/harfbuzz.toml
index d2fae44d..8b49aa73 100644
--- a/recipes/harfbuzz.toml
+++ b/recipes/harfbuzz.toml
@@ -12,5 +12,7 @@ link     = "static"
 configure = "PKG_CONFIG_PATH=/usr/lib/pkgconfig PYTHONPATH=/usr/lib/python3.12/site-packages meson setup output --prefix=/usr --buildtype=release -Ddefault_library=static -Dglib=enabled -Dgobject=disabled -Dcairo=disabled -Dicu=disabled -Dgraphite=disabled -Dfreetype=enabled -Dtests=disabled -Ddocs=disabled -Dintrospection=disabled -Dutilities=disabled"
 compile   = "PYTHONPATH=/usr/lib/python3.12/site-packages ninja -C output"
 install   = "PYTHONPATH=/usr/lib/python3.12/site-packages DESTDIR=/out meson install -C output --no-rebuild"
+# libpng: freetype se compila --with-png ⇒ freetype2.pc trae `Requires: zlib, libpng`; sin libpng.pc
+# en el sandbox, pkg-config no resuelve freetype2 y `meson setup` aborta (mismo patrón que fontconfig).
 [deps]
-build = ["meson", "samurai", "python3", "pkgconf", "freetype", "glib", "pcre2", "libffi", "zlib"]
+build = ["meson", "samurai", "python3", "pkgconf", "freetype", "glib", "pcre2", "libffi", "zlib", "libpng"]