From afb82831fa4d8602859eb00056dd3f418ed363c9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Sun, 6 Jan 2019 18:16:19 +0100
Subject: [PATCH] build-self: Don't clobber the output port.

The newline is meant to follow the spinner's traces so it must go to the
error port as well.

* build-aux/build-self.scm (build): Send newline to the error port.
---
 build-aux/build-self.scm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build-aux/build-self.scm b/build-aux/build-self.scm
index 5b281c3bc9..c1a253dc87 100644
--- a/build-aux/build-self.scm
+++ b/build-aux/build-self.scm
@@ -420,7 +420,7 @@ files."
            (error "build program failed" (list build status)))
           ((? derivation-path? drv)
            (mbegin %store-monad
-             (return (newline (current-output-port)))
+             (return (newline (current-error-port)))
              ((store-lift add-temp-root) drv)
              (return (read-derivation-from-file drv))))
           ("#f"