1this derivation will be built:2 /nix/store/xyy6iv9zhgj4ny3pad3afyndka4cvnak-nix-grpc-store-0.1.0-beta.4.drv3error: 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'.4 Reason: builder failed with exit code 1.5 Output paths:6 /nix/store/fw1prcamy40shwm1phidgncj5cxrdjbn-nix-grpc-store-0.1.0-beta.47 Last 25 log lines:8 > 495 | requires(is_copy_constructible_v<_Tp> && is_copy_constructible_v<_Err> &&9 > | ^10 > /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 satisfied11 > 499 | _LIBCPP_HIDE_FROM_ABI constexpr expected(expected&&)12 > | ^13 > /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 false14 > 500 | requires(is_move_constructible_v<_Tp> && is_move_constructible_v<_Err> && is_trivially_move_constructible_v<_Tp> &&15 > | ^16 > /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 candidate17 > 580 | _LIBCPP_HIDE_FROM_ABI constexpr explicit expected(in_place_t, _Args&&... __args) noexcept(18 > | ^19 > /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 candidate20 > 592 | _LIBCPP_HIDE_FROM_ABI constexpr explicit expected(unexpect_t, _Args&&... __args) noexcept(21 > | ^22 > 3 errors generated.23 > [5/44] Compiling C++ object xfcc-test.p/tests_xfcc-test.cc.o24 > [6/44] Compiling C++ object libnix-grpc-dispatcher.a.p/meson-generated_.._nix_remote.pb.cc.o25 > [7/44] Precompiling header ../pch/client_pch.hh26 > [8/44] Compiling C++ object scheduler-test.p/tests_scheduler-test.cc.o27 > [9/44] Precompiling header ../pch/daemon_pch.hh28 > [10/44] Compiling C++ object farm-client-test.p/tests_farm-client-test.cc.o29 > [11/44] Compiling C++ object libnix-grpc-dispatcher.a.p/src_daemon_dispatcher.cc.o30 > [12/44] Compiling C++ object dispatcher-bench.p/tests_dispatcher-bench.cc.o31 > [13/44] Compiling C++ object oidc-test.p/tests_oidc-test.cc.o32 > ninja: build stopped: subcommand failed.33 For full logs, run:34 nix log /nix/store/xyy6iv9zhgj4ny3pad3afyndka4cvnak-nix-grpc-store-0.1.0-beta.4.drv35error: Cannot build '/nix/store/xyy6iv9zhgj4ny3pad3afyndka4cvnak-nix-grpc-store-0.1.0-beta.4.drv'.36 Reason: builder failed with exit code 1.37 Output paths:38 /nix/store/fw1prcamy40shwm1phidgncj5cxrdjbn-nix-grpc-store-0.1.0-beta.4