mkarchroot: support wrapping pacstrap -U

Needed to support reproducible builds.

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/doc/mkarchroot.1.asciidoc b/doc/mkarchroot.1.asciidoc
index 03d032c..eb0670a 100644
--- a/doc/mkarchroot.1.asciidoc
+++ b/doc/mkarchroot.1.asciidoc
@@ -20,6 +20,9 @@ en_US.UTF-8 and de_DE.UTF-8 locale and a generated machine-id.
 Options
 -------
 
+*-U*::
+	Use 'pacman -U' to install packages.
+
 *-C* <file>::
 	Location of a pacman config file.