HPSF Conference 2025

While primarily run, tested, and developed on Unix-like operating systems, in particular HPC systems, scientific software is often deployed on Windows. Spack's recent expansion to Windows marks a significant milestone, enabling its powerful package management capabilities on a new platform.This talk will provide technical insight into the process of adapting Spack to support a platform orthogonal in design to anything Spack has supported in the past. We cover the path to initial support, the current state of Spack on Windows, and look at the roadmap for future Windows development. We’ll explore unique challenges supporting Windows and their solutions. This talk will address design, new features introduced to support Windows development, and how Spack brings needed robust package management to the Windows ecosystem. We’ll cover best practices for porting new or existing packages to Windows, deploying and managing Spack environments in real-world scenarios, and standardizing your Windows development workflows with a focus on common pitfalls for Windows developers. This talk will provide a pathway for attendees interested in supporting Windows to go forth and Spack!