Worked on the tweag/rules_haskell repository to enhance Windows build stability and improve code quality for Haskell projects using Bazel. Addressed a recurring build failure by introducing a conditional mechanism that prevents the inclusion of import directories for empty libraries, specifically targeting issues with empty _iface directories on Windows. This solution involved updates to Bazel rule definitions using Bzl and build system configuration skills. Additionally, improved the readability of package.bzl by correcting comment indentation, ensuring clearer documentation for future contributors. The work focused on bug fixes rather than new features, emphasizing maintainability and cross-platform reliability within the build system.