daemon: rounds: Keep the differing output if -K is given.

Regardless of -K, we now also print which output differs.

1 files changed, 4 insertions, 0 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index cd4e550ef3..4222e011e5 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -998,6 +998,10 @@ consecutive build results are not bit-for-bit identical.  Note that this
 setting can be overridden by clients such as @command{guix build}
 (@pxref{Invoking guix build}).
 
+When used in conjunction with @option{--keep-failed}, the differing
+output is kept in the store, under @file{/gnu/store/@dots{}-check}.
+This makes it easy to look for differences between the two results.
+
 @item --debug
 Produce debugging output.