ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/2447] COPY ../../libcxxabi/include/__cxxabi_config.h include/c++/v1/__cxxabi_config.h
[2/2447] COPY ../../libcxxabi/include/cxxabi.h include/c++/v1/cxxabi.h
[3/2447] 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'
[4/2447] ACTION //libcxx/include:copy_headers(//llvm/utils/gn/build/toolchain:unix)
[5/2447] CXX obj/llvm/lib/Target/AArch64/Utils/Utils.AArch64BaseInfo.o
[6/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64MCLFIRewriter.o
[7/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64WinCOFFObjectWriter.o
[8/2447] CXX obj/llvm/lib/Target/AArch64/Disassembler/Disassembler.AArch64ExternalSymbolizer.o
[9/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64MCExpr.o
[10/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64ELFObjectWriter.o
[11/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64MachObjectWriter.o
[12/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64MCAsmInfo.o
[13/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64WinCOFFStreamer.o
[14/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64TargetStreamer.o
[15/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64InstPrinter.o
[16/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64ELFStreamer.o
[17/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64MCCodeEmitter.o
[18/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64AsmBackend.o
[19/2447] CXX obj/llvm/lib/CodeGen/CodeGen.PseudoProbeInserter.o
[20/2447] CXX obj/llvm/lib/Target/AArch64/Disassembler/Disassembler.AArch64Disassembler.o
[21/2447] CXX obj/llvm/tools/llvm-exegesis/lib/AArch64/AArch64.Target.o
[22/2447] CXX obj/bolt/lib/Target/AArch64/AArch64.AArch64MCPlusBuilder.o
[23/2447] CXX obj/llvm/lib/Target/AArch64/MCTargetDesc/MCTargetDesc.AArch64MCTargetDesc.o
[24/2447] CXX obj/llvm/lib/Target/AArch64/AsmParser/AsmParser.AArch64AsmParser.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.