.\" -*- mode: troff; coding: utf-8 -*-
.TH "nix3-profile-rollback" "1" ""
.RS
.PP
\fBWarning\fR 
.br
This program is
\fB\fBexperimental\fR\fR
and its interface is subject to change.
.RE
.SH Name
.LP
\f(CRnix profile rollback\fR - roll back to the previous version or a specified version of a profile
.SH Synopsis
.LP
\f(CRnix profile rollback\fR [\fIoption\fR\[u2026]] 
.SH Examples
.IP "\(bu" 3
Roll back your default profile to the previous version:
.LP
.EX
# nix profile rollback
switching profile from version 519 to 518
.EE
.IP "\(bu" 3
Switch your default profile to version 510:
.LP
.EX
# nix profile rollback --to 510
switching profile from version 518 to 510
.EE
.SH Description
.LP
This command switches a profile to the most recent version older
than the currently active version, or if \f(CR--to\fR \fIN\fR is given, to
version \fIN\fR of the profile. To see the available versions of a
profile, use \f(CRnix profile history\fR.
.SH Options
.IP "\(bu" 3
\fB\f(CR--dry-run\fR\fR
.IP
Show what this command would do without doing it.
.IP "\(bu" 3
\fB\f(CR--profile\fR\fR \fIpath\fR
.IP
The profile to operate on.
.IP "\(bu" 3
\fB\f(CR--to\fR\fR \fIversion\fR
.IP
The profile version to roll back to.
.SS
Logging-related options
.IP "\(bu" 3
\fB\f(CR--debug\fR\fR
.IP
Set the logging verbosity level to \(oqdebug\(cq.
.IP "\(bu" 3
\fB\f(CR--log-format\fR\fR \fIformat\fR
.IP
Set the format of log output; one of \f(CRraw\fR, \f(CRinternal-json\fR, \f(CRbar\fR or \f(CRbar-with-logs\fR.
.IP "\(bu" 3
\fB\f(CR--print-build-logs\fR\fR / \f(CR-L\fR
.IP
Print full build logs on standard error.
.IP "\(bu" 3
\fB\f(CR--quiet\fR\fR
.IP
Decrease the logging verbosity level.
.IP "\(bu" 3
\fB\f(CR--verbose\fR\fR / \f(CR-v\fR
.IP
Increase the logging verbosity level.
.SS
Miscellaneous global options
.IP "\(bu" 3
\fB\f(CR--help\fR\fR
.IP
Show usage information.
.IP "\(bu" 3
\fB\f(CR--offline\fR\fR
.IP
Disable substituters and consider all previously downloaded files up-to-date.
.IP "\(bu" 3
\fB\f(CR--option\fR\fR \fIname\fR \fIvalue\fR
.IP
Set the Nix configuration setting \fIname\fR to \fIvalue\fR (overriding \f(CRnix.conf\fR).
.IP "\(bu" 3
\fB\f(CR--refresh\fR\fR
.IP
Consider all previously downloaded files out-of-date.
.IP "\(bu" 3
\fB\f(CR--version\fR\fR
.IP
Show version information.
.RS
.LP
\fBNote\fR
.PP
See \fB\f(CRman nix.conf\fR\fR for overriding configuration settings with command line flags.
.RE