--- a/docs/meson.build
+++ b/docs/meson.build
@@ -164,6 +164,8 @@ docs_api_generated = custom_target(
   ],
 )
 
+subdir_done()
+
 docs_api_xml = docs_api_generated[0]
 docs_lxc_api_xml = docs_api_generated[1]
 docs_qemu_api_xml = docs_api_generated[2]