Guix Peer-to-Peer substitutes

We have seen a lot of progress in the fields of reproducible builds and peer-to-peer storage in recent years. Today Guix project provides a complete set of tools that allows users to have complete control over their software distribution. At the same time most Guix users rely on centralized infrastructure that provides binary artifacts (also called package substitutes) for practical reasons. This project aims to develop systems that will allow Guix users to participate in a process of collaborative building of a public build artifacts cache for different architectures in a tamper resistant way with the help of verifiable build results log. We want to make collective ownership of infrastructure and means for package distribution practical and provide instruments for establishing trust relationships within developer communities.