We are glad to inform you that the first Workshop on Reproducible Software Environments for Research and High-Performance Computing will take place in Montpellier, France, November 8–10, 2023: https://hpc.guix.info/events/2023/workshop/ In the spirit of the Ten Years of Guix event¹ and the earlier French-speaking Workshop on Reproducible Software Environments², this event will gather scientists and high-performance computing (HPC) practitioners—system administrators, engineers, and researchers—to share their experience building robust computational experiments with Guix and related tools. We invite you to submit talks as well as tutorial proposals to the Program Committee at by August 15th. Short talks are allocated a 15mn slot; long talks have 40mn. Relevant topics include: • Experience reports using Guix or other deployment tools to reproduce computational experiments; • Challenges in deploying HPC software on clusters while retaining reproducibility and performance; • Implementing reproducible scientific workflows: from computational experiments to papers; • Challenges in packaging specific scientific or HPC software; • Training and teaching the role of software deployment in reproducible research workflows. We particularly encourage submissions by people from categories underrepresented in the HPC and free software communities. Ludovic Courtès, on behalf of the organizers. ¹ https://10years.guix.gnu.org/program/#Friday ² https://hpc.guix.info/events/2021/atelier-reproductibilité-environnements/