Best alternatives to uvr in 2026

Anyone who's used R for data analysis knows the ritual of waiting for install.packages() to compile things, sometimes for many minutes, every time a project needs its dependencies set up. uvr exists to remove that wait: it's the R-language counterpart to uv, the tool that made Python package installs dramatically faster by rewriting the slow parts in a fast systems language instead of accepting the old tooling's pace as normal. Written in Rust and MIT-licensed, uvr uses a single declarative manifest (uvr.toml) and lockfile (uvr.lock) per project, giving each project its own isolated package library (.uvr/library/) instead of a shared global one that different projects can conflict over. It also manages R versions directly, without needing admin privileges, and installs pre-built binary packages via the Posit Package Manager (P3M) on macOS and Windows, pulling from CRAN, Bioconductor, and GitHub sources. It ships as a standalone binary needing no separate R or Python install, with a CI-friendly frozen lockfile mode and commands (init, add, sync, run, r install/use/pin, lock) that will feel familiar to anyone who has used uv, npm, or cargo.