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Oof. Well, that shouldn't happen. Looks like I goofed when I wrote the PKGBUILD and used ? instead of # to specify the git fragment, so this package has effectively been a -git package all this time. My bad! Fixed now.

There was also some build bustage relating to gcc 15 changing the default C standard to gnu23, so I've overridden that back to gnu17 for the time being.

Looks like we have a build error at the patching stage of the build:

patching file third-party/nanopb/generator/nanopb_generator.py
Hunk #1 FAILED at 34.
Hunk #2 FAILED at 1689.
2 out of 2 hunks FAILED -- saving rejects to file third-party/nanopb/generator/nanopb_generator.py.rej
==> ERROR: A failure occurred in prepare().
    Aborting...
error: failed to build 'chiaki-ng-1.9.6-2':

Hey pickled-dev, thanks for the heads up. You did exactly what I would do, and that last pkgctl build actually completed successfully -- you should have a package you can install with pacman -U after that. I'll update the package shortly with the fixes.

I think the most recent update to CMake on 3/29/25 might be causing issues, or maybe this is just me. I used yay -G chiaki-ng then used pkgctl build inside the directory yay created.

-- Checking for one of the modules 'fftw3'
CMake Error at steamdeck_native/CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.5 has been removed from CMake.

  Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
  to tell CMake that the project requires at least <min> but has been updated
  to work with policies introduced by <max> or earlier.

  Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.


-- Configuring incomplete, errors occurred!
==> ERROR: A failure occurred in build().
    Aborting...
==> ERROR: Build failed, check /var/lib/archbuild/extra-x86_64/mpickle-9/build

Looks like they removed 3.5 compatability with the 4.0 release: https://cmake.org/cmake/help/latest/release/4.0.html#id12.

Adding -DCMAKE_POLICY_VERSION_MINIMUM="3.5" to the cmake command in the PKGBUILD gets me past the error, but then I get this:

[ 74%] Building CXX object gui/CMakeFiles/chiaki.dir/chiaki_autogen/mocs_compilation.cpp.o
In file included from /build/chiaki-ng/src/chiaki-ng/build/gui/chiaki_autogen/6YEA5652QU/../../../../gui/include/qmlmainwindow.h:13,
                 from /build/chiaki-ng/src/chiaki-ng/build/gui/chiaki_autogen/6YEA5652QU/../../../../gui/include/qmlbackend.h:5,
                 from /build/chiaki-ng/src/chiaki-ng/build/gui/chiaki_autogen/6YEA5652QU/moc_qmlbackend.cpp:9,
                 from /build/chiaki-ng/src/chiaki-ng/build/gui/chiaki_autogen/mocs_compilation.cpp:7:
/usr/include/libavutil/hwcontext_vulkan.h:25:10: fatal error: vulkan/vulkan.h: No such file or directory
   25 | #include <vulkan/vulkan.h>
      |          ^~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [gui/CMakeFiles/chiaki.dir/build.make:150: gui/CMakeFiles/chiaki.dir/chiaki_autogen/mocs_compilation.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:818: gui/CMakeFiles/chiaki.dir/all] Error 2
make: *** [Makefile:166: all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...

So I added vulkan-headers to the make-depends section in the PKGBUILD.

But then I get this:

Checking chiaki-ng-debug-1.9.6-2-x86_64.pkg.tar.zst
chiaki-ng-debug W: Directory (usr/src/debug/chiaki-ng/chiaki-ng/build/cli) is empty
==> Running checkpkg
error: target not found: chiaki-ng
==> WARNING: Skipped checkpkg due to missing repo packages
==> Generating .SRCINFO...done

Full output of pkgctl build here: https://pastebin.com/Thpf6CJz

Then I couldn't think of what to do so I ended up going with the FlatPak version for the time being. I'm inept when it comes to this kind of stuff, so this is probably simply an issue on my end, but I figured I'd post here just in case.

Sorry, programistazacny, I somehow missed your comment (busy week).

Great sleuthing, byzxor. Unfortunately chiaki is already using the latest nanopb code, so this needs to be fixed there.

Please could one of you report the problem to the nanopb upstream, and possibly to the chiaki-ng devs here.

In the meantime, I've written a patch to replace the now removed function with the recommended replacement, and confirmed that chiaki-ng builds and launches with that.

Looks like that function was removed from protobuf here

I have a problem with installing/building:

[  0%] Built target cpp-steam-tools_autogen_timestamp_deps
[  0%] Building C object third-party/CMakeFiles/gf_complete.dir/gf-complete/src/gf.c.o
[  1%] Generating takion.pb
[  2%] Generating takion.pb.c, takion.pb.h
[  3%] Building C object third-party/CMakeFiles/gf_complete.dir/gf-complete/src/gf_wgen.c.o
[  4%] Building C object third-party/CMakeFiles/gf_complete.dir/gf-complete/src/gf_w4.c.o
Traceback (most recent call last):
  File "/var/tmp/pamac-build-jacek/chiaki-ng/src/chiaki-ng/third-party/nanopb/generator/nanopb_generator.py", line 2761, in <module>
    main_cli()
    ~~~~~~~~^^
  File "/var/tmp/pamac-build-jacek/chiaki-ng/src/chiaki-ng/third-party/nanopb/generator/nanopb_generator.py", line 2660, in main_cli
    results = process_file(fdesc.name, fdesc, options, other_files)
  File "/var/tmp/pamac-build-jacek/chiaki-ng/src/chiaki-ng/third-party/nanopb/generator/nanopb_generator.py", line 2598, in process_file
    headerdata = ''.join(f.generate_header(includes, headerbasename, options))
  File "/var/tmp/pamac-build-jacek/chiaki-ng/src/chiaki-ng/third-party/nanopb/generator/nanopb_generator.py", line 2128, in generate_header
    yield msg.fields_declaration(self.dependencies) + '\n'
          ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
  File "/var/tmp/pamac-build-jacek/chiaki-ng/src/chiaki-ng/third-party/nanopb/generator/nanopb_generator.py", line 1506, in fields_declaration
    defval = self.default_value(dependencies)
  File "/var/tmp/pamac-build-jacek/chiaki-ng/src/chiaki-ng/third-party/nanopb/generator/nanopb_generator.py", line 1692, in default_value
    msg = reflection.MakeClass(desc)()
          ^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'google.protobuf.reflection' has no attribute 'MakeClass'
make[2]: *** [lib/protobuf/CMakeFiles/chiaki-pb.dir/build.make:74: lib/protobuf/takion.pb.c] Error 1
make[1]: *** [CMakeFiles/Makefile2:610: lib/protobuf/CMakeFiles/chiaki-pb.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[  5%] Building C object third-party/CMakeFiles/gf_complete.dir/gf-complete/src/gf_w8.c.o
[  5%] Building C object third-party/CMakeFiles/gf_complete.dir/gf-complete/src/gf_w16.c.o
[  6%] Building C object third-party/CMakeFiles/gf_complete.dir/gf-complete/src/gf_w32.c.o
[  7%] Building C object third-party/CMakeFiles/gf_complete.dir/gf-complete/src/gf_w64.c.o
[  8%] Building C object third-party/CMakeFiles/gf_complete.dir/gf-complete/src/gf_w128.c.o
[  8%] Building C object third-party/CMakeFiles/gf_complete.dir/gf-complete/src/gf_rand.c.o
[  9%] Building C object third-party/CMakeFiles/gf_complete.dir/gf-complete/src/gf_general.c.o
[ 10%] Building C object third-party/CMakeFiles/gf_complete.dir/gf-complete/src/gf_cpu.c.o
[ 11%] Linking C static library libgf_complete.a
[ 11%] Built target gf_complete
make: *** [Makefile:166: all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...

I recommend building with pkgctl build, but if you want to use makepkg, use makepkg -C to do a clean build rather than adding extra logic to prepare() to achieve the same.

I recommend changing the PKGBUILD for this package, or it may fail when you update. There's a line where it mkdir build without checking if the directory exists, an easy workaround is to replace it with mkdir build || rm -r build && mkdir build (or mkdir -p build if we are sure that old files can be kept around).

@wormzy ahh yes you're completely right, unclear build dir from yay was the culprit. thanks for the reminder, gotta clear out those cache dirs more frequently!