doc: Clarify that package transformations are preserved across upgrades.

Reported by pineapples on #guix.

This is a followup to 8e1907a72430aa989125b053573ef0897c480697.

* doc/guix.texi (Invoking guix package): Remove sentence that says that
package transformations are lost upon upgrading and explicitly say the
opposite.

1 files changed, 2 insertions, 5 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 4a20b3b902..7e7c43286f 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -3576,11 +3576,8 @@ Consequently, this command must be used with care.
 Finally, since @command{guix package} may actually start build
 processes, it supports all the common build options (@pxref{Common Build
 Options}).  It also supports package transformation options, such as
-@option{--with-source} (@pxref{Package Transformation Options}).
-However, note that package transformations are lost when upgrading; to
-preserve transformations across upgrades, you should define your own
-package variant in a Guile module and add it to @env{GUIX_PACKAGE_PATH}
-(@pxref{Defining Packages}).
+@option{--with-source}, and preserves them across upgrades
+(@pxref{Package Transformation Options}).
 
 @node Substitutes
 @section Substitutes