From 7161ef14a2f26fa4f1be9633de2f423492ee76c7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Th=C3=A9ophane=20Hufschmitt?=
 <7226587+thufschmitt@users.noreply.github.com>
Date: Tue, 5 Mar 2024 08:07:58 +0100
Subject: [PATCH] Add a warning against carelessly changing the profile version
 number

Try and prevent the situation of https://github.com/NixOS/nix/issues/10109 to happen again in the future
---
 src/nix/profile.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/nix/profile.cc b/src/nix/profile.cc
index d39a24d36..2bb29a67b 100644
--- a/src/nix/profile.cc
+++ b/src/nix/profile.cc
@@ -222,6 +222,8 @@ struct ProfileManifest
             es[name] = obj;
         }
         nlohmann::json json;
+        // Only upgrade with great care as changing it can break fresh installs
+        // like in https://github.com/NixOS/nix/issues/10109
         json["version"] = 3;
         json["elements"] = es;
         return json;