diff -ur graphics/vkd3d.orig/Makefile graphics/vkd3d/Makefile
--- graphics/vkd3d.orig/Makefile
+++ graphics/vkd3d/Makefile
@@ -19,7 +19,7 @@
 USES=		gmake libtool localbase pkgconfig tar:xz
 USE_LDCONFIG=	yes
 GNU_CONFIGURE=	yes
-CONFIGURE_ARGS=	--with-spirv-tools
+CONFIGURE_ARGS=	--with-spirv-tools --disable-doxygen-doc
 TEST_TARGET=	check
 
 # XXX Move to a separate port (a la graphics/vulkan-headers) and maybe make