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-rw-r--r--src/nix/upgrade-nix.cc2
-rw-r--r--src/nix/upgrade-nix.md9
2 files changed, 7 insertions, 4 deletions
diff --git a/src/nix/upgrade-nix.cc b/src/nix/upgrade-nix.cc
index 17a5a77ee..2d2453395 100644
--- a/src/nix/upgrade-nix.cc
+++ b/src/nix/upgrade-nix.cc
@@ -34,7 +34,7 @@ struct CmdUpgradeNix : MixDryRun, StoreCommand
std::string description() override
{
- return "upgrade Nix to the latest stable version";
+ return "upgrade Nix to the stable version declared in Nixpkgs";
}
std::string doc() override
diff --git a/src/nix/upgrade-nix.md b/src/nix/upgrade-nix.md
index 4d27daad9..084c80ba2 100644
--- a/src/nix/upgrade-nix.md
+++ b/src/nix/upgrade-nix.md
@@ -2,7 +2,7 @@ R""(
# Examples
-* Upgrade Nix to the latest stable version:
+* Upgrade Nix to the stable version declared in Nixpkgs:
```console
# nix upgrade-nix
@@ -16,8 +16,11 @@ R""(
# Description
-This command upgrades Nix to the latest version. By default, it
-locates the directory containing the `nix` binary in the `$PATH`
+This command upgrades Nix to the stable version declared in Nixpkgs.
+This stable version is defined in [nix-fallback-paths.nix](https://github.com/NixOS/nixpkgs/raw/master/nixos/modules/installer/tools/nix-fallback-paths.nix)
+and updated manually. It may not always be the latest tagged release.
+
+By default, it locates the directory containing the `nix` binary in the `$PATH`
environment variable. If that directory is a Nix profile, it will
upgrade the `nix` package in that profile to the latest stable binary
release.