Worked on the python/cpython repository to address a critical build system issue affecting cross-platform reliability, with a focus on AIX environments. Tackled a persistent build failure by modifying Makefile-based linker flag configurations, ensuring unsupported options were excluded for AIX compatibility. This targeted bug fix restored successful builds on AIX, directly improving CI stability and reducing the risk of post-merge failures. Leveraged expertise in build system configuration and cross-platform development to document AIX-specific constraints, enhancing future maintainability. The work contributed to smoother release cycles and better traceability, with all changes linked to the relevant GitHub issue for knowledge sharing.