nix/fossbeamer: use wrapGAppsHook instead of manual wrapper in cage

[Kranzes]

This fixes font sizes.

[nikstur]

Cool

[flokli]

It's failing to crosscompile though:

Wrapping program '/nix/store/h74fvnfj7dsazc8075d6yagygrgvqppb-rust_fossbeamer-0.1.0-aarch64-unknown-linux-gnu/bin/fossbeamer'
/nix/store/7cg6dy322gd7k1f8n95n4gs44yyr9rf6-gcc-wrapper-13.3.0/bin/cc: line 257: /nix/store/5vfarsvf1i2nj9vzgv8hkz1ifnm25c6y-gcc-aarch64-unknown-linux-gnu-13.3.0/bin/gcc: cannot execute binary file: Exec format error
/nix/store/7cg6dy322gd7k1f8n95n4gs44yyr9rf6-gcc-wrapper-13.3.0/bin/cc: line 257: /nix/store/5vfarsvf1i2nj9vzgv8hkz1ifnm25c6y-gcc-aarch64-unknown-linux-gnu-13.3.0/bin/gcc: Success
error: build of '/nix/store/574mfphqblswgfjpr9labf4i2k9w9p1v-rust_fossbeamer-0.1.0-aarch64-unknown-linux-gnu.drv' on 'ssh://root@ws.my.flokli.io' failed: builder for '/nix/store/574mfphqblswgfjpr9labf4i2k9w9p1v-rust_fossbeamer-0.1.0-aarch64-unknown-linux-gnu.drv' failed with exit code 1
error: builder for '/nix/store/574mfphqblswgfjpr9labf4i2k9w9p1v-rust_fossbeamer-0.1.0-aarch64-unknown-linux-gnu.drv' failed with exit code 1;
       last 10 log lines:
       > Running phase: dropIconThemeCache
       > Running phase: dropIconThemeCache
       > Running phase: fixupPhase
       > calling 'preFixup' function hook '_moveToShare'
       > calling 'preFixup' function hook '_multioutDocs'
       > calling 'preFixup' function hook '_multioutDevs'
       > calling 'fixupOutput' function hook 'wrapGAppsHook'
       > Wrapping program '/nix/store/h74fvnfj7dsazc8075d6yagygrgvqppb-rust_fossbeamer-0.1.0-aarch64-unknown-linux-gnu/bin/fossbeamer'
       > /nix/store/7cg6dy322gd7k1f8n95n4gs44yyr9rf6-gcc-wrapper-13.3.0/bin/cc: line 257: /nix/store/5vfarsvf1i2nj9vzgv8hkz1ifnm25c6y-gcc-aarch64-unknown-linux-gnu-13.3.0/bin/gcc: cannot execute binary file: Exec format error
       > /nix/store/7cg6dy322gd7k1f8n95n4gs44yyr9rf6-gcc-wrapper-13.3.0/bin/cc: line 257: /nix/store/5vfarsvf1i2nj9vzgv8hkz1ifnm25c6y-gcc-aarch64-unknown-linux-gnu-13.3.0/bin/gcc: Success
       For full logs, run 'nix log /nix/store/574mfphqblswgfjpr9labf4i2k9w9p1v-rust_fossbeamer-0.1.0-aarch64-unknown-linux-gnu.drv'.
error: 1 dependencies of derivation '/nix/store/ixrhi9amjmgzd4yv4fnbqhjdj7al3bw5-rust_fossbeamer-0.1.0-aarch64-unknown-linux-gnu-linked.drv' failed to build

(repro with nix-build nix -A machine-cm3.toplevel or nix-build nix -A pkgs.pkgsCross.aarch64-multiplatform.fossbeamer ,

[Kranzes]

I hate GitHub, I'm continuing in #34