casadi> [219/401] Building CXX object casadi/interfaces/clang/CMakeFiles/casadi_importer_clang.dir/clang_compiler.cpp.o
casadi> FAILED: casadi/interfaces/clang/CMakeFiles/casadi_importer_clang.dir/clang_compiler.cpp.o
casadi> /nix/store/67x7pknz0qa2j16x02idf0x98lpcspah-gcc-wrapper-14.3.0/bin/g++ -DCASADI_DEFAULT_COMPILER_PLUGIN=clang -DCASADI_IS_RELEASE=1 -DCASADI_MAJOR_VERSION=3 -DCASADI_MINOR_VERSION=7 -DCASADI_PATCH_VERSION=1 -DCASADI_SNPRINTF=snprintf -DCASADI_VERSION=31 -DCASADI_WITH_THREAD -DCASADI_WITH_THREADSAFE_SYMBOLICS -DHAVE_MKSTEMPS -DUSE_CXX11 -DWITH_DEEPBIND -DWITH_DEPRECATED_FEATURES -DWITH_DL -D_GNU_SOURCE -D_SCL_SECURE_NO_WARNINGS -D_USE_MATH_DEFINES -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Dcasadi_importer_clang_EXPORTS -I/build/source/. -I/build/source/build -I/build/source/build/casadi/core/runtime -I/build/source/casadi/core/../.. -I/build/source/build/casadi/core/../.. -fopenmp -DWITH_OPENMP -pthread -fPIC   -O3 -DNDEBUG -fPIC -MD -MT casadi/interfaces/clang/CMakeFiles/casadi_importer_clang.dir/clang_compiler.cpp.o -MF casadi/interfaces/clang/CMakeFiles/casadi_importer_clang.dir/clang_compiler.cpp.o.d -o casadi/interfaces/clang/CMakeFiles/casadi_importer_clang.dir/clang_compiler.cpp.o -c /build/source/casadi/interfaces/clang/clang_compiler.cpp
casadi> /build/source/casadi/interfaces/clang/clang_compiler.cpp: In static member function 'static std::vector<std::pair<std::__cxx11::basic_string<char>, bool> > casadi::ClangCompiler::getIncludes(const std::string&, const std::string&)':
casadi> /build/source/casadi/interfaces/clang/clang_compiler.cpp:260:27: error: 'Filesystem' has not been declared
casadi>   260 |     auto setup_file_ptr = Filesystem::ifstream_ptr(path + sep + file);
casadi>       |                           ^~~~~~~~~~