[Geary] geary .012? FAILED: src/engine/geary-engine-internal.vapi

[EHoliday <eholiday gmail com>]

>From github this morning April 26 2018.

Debian 9.4 up to date. 

root@debian:/hd2/projects/geary# ninja -C build install

ninja: Entering directory `build'

[2/118] Generating geary-engine-internal-vapi with a custom command.

FAILED: src/engine/geary-engine-internal.vapi 

/bin/cp geary-engine.h geary-engine-internal.h src/engine/geary-engine@sta/geary-engine-internal.vapi src/engine

/bin/cp: cannot stat 'src/engine/geary-engine@sta/geary-engine-internal.vapi': No such file or directory

[7/118] Compiling C object 'src/client/src@client@@geary-client@sta/meson-generated_components_main-window.c.o'.

ninja: build stopped: subcommand failed.

meson build included these questionable messages (excerpted) :

Dependency unity found: NO

Library libmessaging-menu found: NO

DEPRECATION: The "languages" argument of gnome.yelp() is deprecated.

Use a LINGUAS file in the sources directory instead.

This will become a hard error in the future.

WARNING: GLib compiled dependencies do not work reliably with 

the current version of GLib. See the following upstream issue: https://bugzilla.gnome.org/show_bug.cgi?id=774368

Program cp found: YES (/bin/cp)

Build targets in project: 25

Found ninja-1.7.2 at /usr/bin/ninja

Something I'm missing or not doing correctly?