2023-01-29 00:07:26 +00:00
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.Dd January 1, 1980
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2023-02-22 15:30:04 +00:00
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.Dt nixos-version 8
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.Os
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2023-01-29 00:07:26 +00:00
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.Sh NAME
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.Nm nixos-version
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.Nd show the NixOS version
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.
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.
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.Sh SYNOPSIS
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.Nm nixos-version
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.Op Fl -hash
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.Op Fl -revision
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.Op Fl -configuration-revision
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.Op Fl -json
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.
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.
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.
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.Sh DESCRIPTION
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This command shows the version of the currently active NixOS configuration. For example:
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.Bd -literal -offset indent
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$ nixos-version
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16.03.1011.6317da4 (Emu)
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.Ed
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.
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.Pp
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The version consists of the following elements:
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.Bl -tag -width indent
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.It Ql 16.03
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The NixOS release, indicating the year and month in which it was released
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(e.g. March 2016).
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.It Ql 1011
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The number of commits in the Nixpkgs Git repository between the start of the
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release branch and the commit from which this version was built. This ensures
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that NixOS versions are monotonically increasing. It is
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.Ql git
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when the current NixOS configuration was built from a checkout of the Nixpkgs
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Git repository rather than from a NixOS channel.
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.It Ql 6317da4
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The first 7 characters of the commit in the Nixpkgs Git repository from which
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this version was built.
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.It Ql Emu
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The code name of the NixOS release. The first letter of the code name indicates
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that this is the N'th stable NixOS release; for example, Emu is the fifth
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release.
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.El
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.Sh OPTIONS
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.Bl -tag -width indent
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.It Fl -hash , -revision
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Show the full SHA1 hash of the Git commit from which this configuration was
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built, e.g.
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.Bd -literal -offset indent
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$ nixos-version --hash
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6317da40006f6bc2480c6781999c52d88dde2acf
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.Ed
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.
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.It Fl -configuration-revision
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Show the configuration revision if available. This could be the full SHA1 hash
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of the Git commit of the system flake, if you add
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.Bd -literal -offset indent
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{ system.configurationRevision = self.rev or "dirty"; }
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.Ed
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.Pp
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to the
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.Ql modules
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array of your flake.nix system configuration e.g.
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.Bd -literal -offset indent
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$ nixos-version --configuration-revision
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aa314ebd1592f6cdd53cb5bba8bcae97d9323de8
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.Ed
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.It Fl -json
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Print a JSON representation of the versions of NixOS and the top-level
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configuration flake.
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.El
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.Sh AUTHORS
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.An -nosplit
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.An Eelco Dolstra
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and
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.An the Nixpkgs/NixOS contributors
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