diff --git a/build/windows/gitlab-ci/build-deps-msys2.sh b/build/windows/gitlab-ci/build-deps-msys2.sh
index 6796856e5c..45c4fbdf07 100644
--- a/build/windows/gitlab-ci/build-deps-msys2.sh
+++ b/build/windows/gitlab-ci/build-deps-msys2.sh
@@ -71,42 +71,6 @@ make
 make install
 cd ../..
 
-## GTK (patched from MSYS2) ##
-
-pacman --noconfirm -S --needed \
-    mingw-w64-$MSYS2_ARCH-adwaita-icon-theme \
-    mingw-w64-$MSYS2_ARCH-atk \
-    mingw-w64-$MSYS2_ARCH-gdk-pixbuf2 \
-    mingw-w64-$MSYS2_ARCH-libepoxy \
-    mingw-w64-$MSYS2_ARCH-libxslt \
-    mingw-w64-$MSYS2_ARCH-sassc \
-    mingw-w64-$MSYS2_ARCH-shared-mime-info
-
-git clone --branch 3.24.30 --depth=${GIT_DEPTH} https://gitlab.gnome.org/GNOME/gtk.git _gtk
-
-cd _gtk/
-wget "https://github.com/msys2/MINGW-packages/raw/master/mingw-w64-gtk3/0002-Revert-Quartz-Set-the-popup-menu-type-hint-before-re.patch"
-wget "https://github.com/msys2/MINGW-packages/raw/master/mingw-w64-gtk3/0003-gtkwindow-Don-t-force-enable-CSD-under-Windows.patch"
-wget "https://github.com/msys2/MINGW-packages/raw/master/mingw-w64-gtk3/0004-Disable-low-level-keyboard-hook.patch"
-wget "https://github.com/msys2/MINGW-packages/raw/master/mingw-w64-gtk3/0005-gdkkeys-win32.c-fix-initialisation-of-key_state-in-u.patch"
-wget "https://raw.githubusercontent.com/msys2/MINGW-packages/master/mingw-w64-gtk3/0006-avoid-diagnostics-for-gcc-11-false-positive-out-of-bounds.patch"
-patch -p1 < 0002-Revert-Quartz-Set-the-popup-menu-type-hint-before-re.patch
-patch -p1 < 0003-gtkwindow-Don-t-force-enable-CSD-under-Windows.patch
-patch -p1 < 0004-Disable-low-level-keyboard-hook.patch
-patch -p1 < 0005-gdkkeys-win32.c-fix-initialisation-of-key_state-in-u.patch
-patch -p1 < 0006-avoid-diagnostics-for-gcc-11-false-positive-out-of-bounds.patch
-# Patches not in MSYS2 build.
-patch -p1 < ../build/windows/patches/gtk3-24-mr3661-gimp-issue-5475.patch
-
-mkdir _build
-cd _build
-meson -Dprefix="${GIMP_PREFIX}" \
-      --wrap-mode=nodownload --auto-features=enabled \
-      --buildtype=release
-ninja
-ninja install
-cd ../..
-
 ## babl and GEGL (follow master branch) ##
 
 git clone --depth=${GIT_DEPTH} https://gitlab.gnome.org/GNOME/babl.git _babl