diff --git a/babl/meson.build b/babl/meson.build
index f6dd81c..ec42f68 100644
--- a/babl/meson.build
+++ b/babl/meson.build
@@ -159,15 +159,19 @@ if build_gir
   # identity filter, so GIR doesn't choke on the Babl type
   # (since it has the same name as the Babl namespace)
   babl_gir = gnome.generate_gir(
     babl,
     sources: babl_headers,
     extra_args: [
       '--identifier-filter-cmd=@0@ @1@'.format(python.full_path(), 
       '"' + meson.current_source_dir() / 'identfilter.py' + '"'),
       '-DBABL_IS_BEING_COMPILED',
+      # Windows DLL resolution for the temporary GIR helper executable is
+      # unreliable in vcpkg builds. Babl does not expose GObject runtime
+      # types, so a header-only scan is sufficient here.
+      platform_win32 ? '--header-only' : '',
       '--quiet',
     ],
     namespace: 'Babl',
     nsversion: api_version,
     header: 'babl.h',
     export_packages: 'babl-0.1',
     install: true,
   )