Editable mode error for mac installation

[jackzhxng]

🐛 Describe the bug

> git submodule update --recursive --init && ./install_executorch.sh --clean && ./install_executorch.sh --editable
FileNotFoundError: [Errno 2] No such file or directory: '/private/var/folders/p_/bvy3h_s57w18gxl7p2sy_p9w0000gn/T/tmp2v1y3wut.build-lib/executorch/data/bin/flatc'

Versions

Collecting environment information...
PyTorch version: 2.7.0.dev20250131
Is debug build: False
CUDA used to build PyTorch: None
ROCM used to build PyTorch: N/A

OS: macOS 15.3.1 (arm64)
GCC version: Could not collect
Clang version: 16.0.0 (clang-1600.0.26.6)
CMake version: version 3.30.0-rc3
Libc version: N/A

Python version: 3.10.0 (default, Mar  3 2022, 03:54:28) [Clang 12.0.0 ] (64-bit runtime)
Python platform: macOS-15.3.1-arm64-arm-64bit
Is CUDA available: False
CUDA runtime version: No CUDA
CUDA_MODULE_LOADING set to: N/A
GPU models and configuration: No CUDA
Nvidia driver version: No CUDA
cuDNN version: No CUDA
HIP runtime version: N/A
MIOpen runtime version: N/A
Is XNNPACK available: True

CPU:
Apple M1 Pro

Versions of relevant libraries:
[pip3] executorch==0.5.0a0+b1f6678
[pip3] flake8==7.1.1
[pip3] mypy-extensions==1.0.0
[pip3] numpy==1.21.3
[pip3] torch==2.7.0.dev20250131
[pip3] torchao==0.10.0+git7d879462
[pip3] torchaudio==2.6.0.dev20250131
[pip3] torchsr==1.0.4
[pip3] torchvision==0.22.0.dev20250131
[conda] executorch                0.5.0a0+b1f6678          pypi_0    pypi
[conda] numpy                     1.21.3                   pypi_0    pypi
[conda] torch                     2.7.0.dev20250131          pypi_0    pypi
[conda] torchao                   0.10.0+git7d879462          pypi_0    pypi
[conda] torchaudio                2.6.0.dev20250131          pypi_0    pypi
[conda] torchsr                   1.0.4                    pypi_0    pypi
[conda] torchvision               0.22.0.dev20250131          pypi_0    pypi

cc @larryliu0820 @lucylq

[larryliu0820]

I think this is fixed. @jackzhxng does this repro for you?

[larryliu0820]

#8858

[jackzhxng]

@larryliu0820 this was from a fresh master branch yesterday and your PR is from a week ago

[jackzhxng]

I also just repro'd it again after pulling to make sure

[larryliu0820]

@jackzhxng can you past your error log