Nix Daemon and Client Protocol Support Update (Minimum Version 2.0)

doc/manual/rl-next/dropped-compat.md

a5d4b6bdb98980fc6441f13d3f9e9faef30b1a1341f45e80000000030000013a

---
synopsis: "Removed support for daemons and clients older than Nix 2.0"
prs: [13951]
---

We have dropped support in the daemon worker protocol for daemons and clients that don't speak at least version 18 of the protocol. This first Nix release that supports this version is Nix 2.0, released in February 2018.

Chunks

872215b7 (1st chunk of `doc/manual/rl-next/dropped-compat.md`)

Title: Nix Daemon and Client Protocol Support Update (Minimum Version 2.0)

Summary

Support has been removed for Nix daemons and clients that use a protocol version older than 18. This means that only Nix versions 2.0 and newer (released February 2018) are now supported for the daemon worker protocol.