Blazingly fast
A Bloom filter returns instant "not found" responses; SQLite FTS5 powers full-text search across millions of versions.
// nix version index
nxvAny version. Any package. Instantly.
Find any version of any Nix package, instantly.
Skip to content
Complete history
Every channel-released nixpkgs version since 2016 — including nested sets like python3Packages — at Hydra-built, cache-backed commits.
Offline-first
Download the ~220MB index once and query locally — no network required after the initial sync.
Security aware
Clear indicators for insecure packages and known CVEs, with an opt-in toggle to include them.
// quick example
Stop spelunking through commits
bash
# which nixpkgs commit shipped python 2.7?
nxv search python 2.7
# find a specific version
nxv search python --version 3.11
# get the full version timeline
nxv history python311
# pin it in one line
nix shell nixpkgs/e4a45f9#python27