Worked on the pytorch/pytorch repository to enhance build reliability and environment management for PyTorch Inductor. Developed a feature that allows the use of TORCH_CUSTOM_PYTHONPATH to override the default PYTHONPATH passed to subprocesses, specifically addressing challenges with long PYTHONPATHs in Bazel-based environments. This solution improves consistency across continuous integration and developer workflows by providing more flexible environment configuration. The implementation was carried out using Python and focused on subprocess management and environment variable handling. The work demonstrates a targeted approach to solving environment configuration issues within complex build systems, contributing to smoother development and testing processes for PyTorch Inductor.