this derivation will be built:
  /nix/store/xyy6iv9zhgj4ny3pad3afyndka4cvnak-nix-grpc-store-0.1.0-beta.4.drv
error: build of '/nix/store/xyy6iv9zhgj4ny3pad3afyndka4cvnak-nix-grpc-store-0.1.0-beta.4.drv' on 'ssh-ng://customer@mac02' failed: Cannot build '/nix/store/xyy6iv9zhgj4ny3pad3afyndka4cvnak-nix-grpc-store-0.1.0-beta.4.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/fw1prcamy40shwm1phidgncj5cxrdjbn-nix-grpc-store-0.1.0-beta.4
       Last 25 log lines:
       >   495 |     requires(is_copy_constructible_v<_Tp> && is_copy_constructible_v<_Err> &&
       >       |              ^
       > /nix/store/9z187ss3liak3pngakax2ip7nb1dc7z5-libcxx-21.1.6+apple-sdk-26.5/include/c++/v1/__expected/expected.h:499:35: note: candidate constructor not viable: constraints not satisfied
       >   499 |   _LIBCPP_HIDE_FROM_ABI constexpr expected(expected&&)
       >       |                                   ^
       > /nix/store/9z187ss3liak3pngakax2ip7nb1dc7z5-libcxx-21.1.6+apple-sdk-26.5/include/c++/v1/__expected/expected.h:500:79: note: because 'is_trivially_move_constructible_v<nixgrpc::UniqueFd>' evaluated to false
       >   500 |     requires(is_move_constructible_v<_Tp> && is_move_constructible_v<_Err> && is_trivially_move_constructible_v<_Tp> &&
       >       |                                                                               ^
       > /nix/store/9z187ss3liak3pngakax2ip7nb1dc7z5-libcxx-21.1.6+apple-sdk-26.5/include/c++/v1/__expected/expected.h:580:44: note: explicit constructor is not a candidate
       >   580 |   _LIBCPP_HIDE_FROM_ABI constexpr explicit expected(in_place_t, _Args&&... __args) noexcept(
       >       |                                            ^
       > /nix/store/9z187ss3liak3pngakax2ip7nb1dc7z5-libcxx-21.1.6+apple-sdk-26.5/include/c++/v1/__expected/expected.h:592:44: note: explicit constructor is not a candidate
       >   592 |   _LIBCPP_HIDE_FROM_ABI constexpr explicit expected(unexpect_t, _Args&&... __args) noexcept(
       >       |                                            ^
       > 3 errors generated.
       > [5/44] Compiling C++ object xfcc-test.p/tests_xfcc-test.cc.o
       > [6/44] Compiling C++ object libnix-grpc-dispatcher.a.p/meson-generated_.._nix_remote.pb.cc.o
       > [7/44] Precompiling header ../pch/client_pch.hh
       > [8/44] Compiling C++ object scheduler-test.p/tests_scheduler-test.cc.o
       > [9/44] Precompiling header ../pch/daemon_pch.hh
       > [10/44] Compiling C++ object farm-client-test.p/tests_farm-client-test.cc.o
       > [11/44] Compiling C++ object libnix-grpc-dispatcher.a.p/src_daemon_dispatcher.cc.o
       > [12/44] Compiling C++ object dispatcher-bench.p/tests_dispatcher-bench.cc.o
       > [13/44] Compiling C++ object oidc-test.p/tests_oidc-test.cc.o
       > ninja: build stopped: subcommand failed.
       For full logs, run:
         nix log /nix/store/xyy6iv9zhgj4ny3pad3afyndka4cvnak-nix-grpc-store-0.1.0-beta.4.drv
error: Cannot build '/nix/store/xyy6iv9zhgj4ny3pad3afyndka4cvnak-nix-grpc-store-0.1.0-beta.4.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/fw1prcamy40shwm1phidgncj5cxrdjbn-nix-grpc-store-0.1.0-beta.4