ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/7299] COPY ../../libcxxabi/include/cxxabi.h include/c++/v1/cxxabi.h
[2/7299] COPY ../../libcxxabi/include/__cxxabi_config.h include/c++/v1/__cxxabi_config.h
[3/7299] AR lib/libLLVMSupport.a
[4/7299] AR lib/libgtest_main.a
[5/7299] ACTION //llvm/lib/Transforms/IPO:write_instrumentor_variables(//llvm/utils/gn/build/toolchain:unix)
FAILED: gen/llvm/include/llvm/Transforms/IPO/InstrumentorVariables.inc 
python3 ../../llvm/utils/gn/build/write_cmake_config.py -o gen/llvm/include/llvm/Transforms/IPO/InstrumentorVariables.inc ../../llvm/include/llvm/Transforms/IPO/InstrumentorVariables.inc.in LLVM_INSTRUMENTOR_RUNTIME_HELPER=@file:/usr/local/google/home/thakis/src/llvm-project/out/gn
Traceback (most recent call last):
  File "/usr/local/google/home/thakis/src/llvm-project/out/gn/../../llvm/utils/gn/build/write_cmake_config.py", line 126, in <module>
    sys.exit(main())
             ~~~~^^
  File "/usr/local/google/home/thakis/src/llvm-project/out/gn/../../llvm/utils/gn/build/write_cmake_config.py", line 58, in main
    with open(file_path) as f:
         ~~~~^^^^^^^^^^^
IsADirectoryError: [Errno 21] Is a directory: '/usr/local/google/home/thakis/src/llvm-project/out/gn'
[6/7299] LINK ./bin/clang-tidy-confusable-chars-gen
[7/7299] LINK ./bin/lldb-argdumper
[8/7299] LINK ./bin/lldb-tblgen
[9/7299] LINK obj/llvm/unittests/Bitstream/BitstreamTests
[10/7299] LINK obj/llvm/unittests/LineEditor/LineEditorTests
[11/7299] LINK ./bin/not
[12/7299] LINK ./bin/llvm-undname
[13/7299] LINK ./bin/FileCheck
[14/7299] LINK obj/llvm/unittests/DebugInfo/MSF/DebugInfoMSFTests
[15/7299] LINK ./bin/clang-tblgen
[16/7299] LINK obj/llvm/unittests/Demangle/DemangleTests
[17/7299] LINK obj/llvm/unittests/Testing/ADT/TestingADTTests
[18/7299] LINK ./bin/yaml-bench
[19/7299] LINK obj/llvm/unittests/HTTP/HTTPTests
[20/7299] LINK obj/llvm/unittests/Support/LSP/LSPTests
[21/7299] LINK obj/llvm/unittests/FileCheck/FileCheckTests
[22/7299] LINK ./bin/split-file
[23/7299] LINK obj/llvm/unittests/DebugInfo/CodeView/DebugInfoCodeViewTests
[24/7299] LINK obj/llvm/unittests/CAS/CASTests
[25/7299] LINK obj/llvm/unittests/Testing/Support/TestingSupportTests
[26/7299] LINK ./bin/llvm-min-tblgen
[27/7299] LINK obj/llvm/unittests/Support/DynamicLibrary/DynamicLibraryTests
[28/7299] ACTION //libcxx/include:copy_headers(//llvm/utils/gn/build/toolchain:unix)
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.