How to build metapackages?

[s3rius]

Seems like uFBT currently doesn't support building Apps which are of type METAPACKAGE.

Here's the project layout:

 .
├──  application.fam
└──  btcon
    ├──  application.fam
    ├──  icon.png
    └── 󱧼 src
        └── ...

Contents of application.fam:

App(
    appid="flippys",
    name="Flippys",
    apptype=FlipperAppType.METAPACKAGE,
    provides=[
      "btcon",
    ]
)

Contents of btcon/application.fam:

App(
    appid="btcon",
    name="Btcon",
    apptype=FlipperAppType.EXTERNAL,
    entry_point="btcon",
    stack_size=2 * 1024,
    fap_libs=["ble_profile"],
    fap_description="Flipper controller for my pc.",
    fap_category="Bluetooth",
    fap_icon="icon.png",
    fap_icon_assets="assets",
)

When I run ufbt build I get this output:

scons: Entering directory `/home/s3rius/.ufbt/current/scripts/ufbt'
scons: *** [phony_build] More than one app is runnable: . Please specify an app with APPID=...

Am I missing something?