diff --git a/recipes/incoming-clib/gtk4.toml b/recipes/incoming-clib/gtk4.toml
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+++ b/recipes/incoming-clib/gtk4.toml
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+# gtk4 4.18.6 — el toolkit de GUI. meson static, backend SOLO wayland (sin X11/broadway/win/mac),
+# renderer GL vía libepoxy (vulkan disabled), todo lo opcional off (demos/tests/docs/cups/gstreamer/
+# introspection). Corona el stack gráfico C del lab: con esto el corpus puede producir apps GTK reales.
+# Deps = cierre transitivo .pc completo (pkg-config estático resuelve Requires.private).
+name    = "gtk4"
+version = "4.18.6"
+
+[source]
+tarball = "https://download.gnome.org/sources/gtk/4.18/gtk-4.18.6.tar.xz"
+sha256  = "e1817c650ddc3261f9a8345b3b22a26a5d80af154630dedc03cc7becefffd0fa"
+
+[build]
+compiler = "zig-cc"
+target   = "x86_64-linux-musl"
+link     = "static"
+
+[build.phases]
+# GTK4 construye libgtk.a (static_library 'gtk') Y libgtk-4.so; las tools linkean la .so con libgtk_dep,
+# imposible en el lab static-musl. Parche: que las tools usen libgtk_static_dep (la .a). El sed es seguro:
+# "libgtk_dep" NO es substring de "libgtk_static_dep" ⇒ no toca las que ya usan el estático.
+configure = "sed -i 's/libgtk_dep/libgtk_static_dep/g' tools/meson.build && PKG_CONFIG_PATH=/usr/lib/pkgconfig PYTHONPATH=/usr/lib/python3.12/site-packages meson setup output --prefix=/usr --buildtype=release --wrap-mode=nodownload --prefer-static -Ddefault_library=static -Dwayland-backend=true -Dx11-backend=false -Dbroadway-backend=false -Dwin32-backend=false -Dmacos-backend=false -Dvulkan=disabled -Dintrospection=disabled -Dbuild-demos=false -Dbuild-testsuite=false -Dbuild-tests=false -Dbuild-examples=false -Dmedia-gstreamer=disabled -Dprint-cups=disabled -Dprint-cpdb=disabled -Dcloudproviders=disabled -Dsysprof=disabled -Dtracker=disabled -Dcolord=disabled -Df16c=disabled -Ddocumentation=false -Dman-pages=false -Dc_args=-Wno-error=date-time"
+compile   = "PYTHONPATH=/usr/lib/python3.12/site-packages ninja -C output"
+# meson instala solo libgtk-4.so; copio el static_library('gtk') (libgtk.a, GTK completo) como libgtk-4.a
+# para que `-lgtk-4` + `-static` resuelva al estático (el lab es static-musl).
+install   = "PYTHONPATH=/usr/lib/python3.12/site-packages DESTDIR=/out meson install -C output --no-rebuild && cp output/gtk/libgtk.a /out/usr/lib/libgtk-4.a"
+
+[deps]
+build = ["meson", "samurai", "python3", "pkgconf", "glib", "cairo", "pango", "gdk-pixbuf", "graphene", "libepoxy", "wayland", "wayland-protocols", "libxkbcommon", "libdrm", "fontconfig", "harfbuzz", "fribidi", "libpng", "pixman", "freetype", "expat", "libffi", "pcre2", "zlib", "libjpeg-turbo", "libtiff", "mesa"]