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-rw-r--r--nix/scripts/list-runtime-roots.in5
1 files changed, 4 insertions, 1 deletions
diff --git a/nix/scripts/list-runtime-roots.in b/nix/scripts/list-runtime-roots.in
index 993eb169c1..a6938087b5 100644
--- a/nix/scripts/list-runtime-roots.in
+++ b/nix/scripts/list-runtime-roots.in
@@ -1,7 +1,7 @@
 #!@GUILE@ -ds
 !#
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2017 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -133,6 +133,9 @@ or the empty list."
         (define %file-rx
           (make-regexp "^n/(.*)$"))
 
+        ;; We're going to read it all.
+        (setvbuf pipe _IOFBF 16384)
+
         (let loop ((line  (read-line pipe))
                    (roots '()))
           (cond ((eof-object? line)