Worked on the facebook/buck2-prelude repository to port the Haskell IDE to GHC 9.2.4, focusing on improving compatibility and stability for developers. The approach involved updating the build system to exclude z- packages, implementing a build guard that detects and blocks older toolchains with upgrade guidance, and addressing issues with Template Haskell object loading and GHC options caching. Leveraged skills in build system configuration, compiler toolchain management, and languages such as BXL and Bzl. These changes reduced build-time and runtime friction, simplified the build graph, and enhanced reliability for teams adopting the latest Haskell compiler toolchain.