14/31: gnu: tipp10: Use INVOKE.

[Tobias Geerinckx-Rice]

nckx pushed a commit to branch master
in repository guix.

commit 946e5e8aa182cccdfeb43975db0b660bc83c2590
Author: Tobias Geerinckx-Rice <address@hidden>
Date:   Sun Apr 1 07:39:32 2018 +0200

    gnu: tipp10: Use INVOKE.
    
    * gnu/packages/education.scm (tipp10)[arguments]: Substitute INVOKE for
    SYSTEM*.
---
 gnu/packages/education.scm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/education.scm b/gnu/packages/education.scm
index 72cd7c6..03050ff 100644
--- a/gnu/packages/education.scm
+++ b/gnu/packages/education.scm
@@ -3,6 +3,7 @@
 ;;; Copyright © 2016, 2017 Ricardo Wurmus <address@hidden>
 ;;; Copyright © 2016 Hartmut Goebel <address@hidden>
 ;;; Copyright © 2017, 2018 Efraim Flashner <address@hidden>
+;;; Copyright © 2018 Tobias Geerinckx-Rice <address@hidden>
 ;;; Copyright © 2018 Nicolas Goaziou <address@hidden>
 ;;;
 ;;; This file is part of GNU Guix.
@@ -216,7 +217,7 @@ Currently available boards include:
                (substitute* "def/defines.h"
                  (("\"/usr/") (string-append "\"" out "/")))
                ;; Recreate Makefile
-               (zero? (system* "qmake"))))))))
+               (invoke "qmake")))))))
     (inputs
      `(("qt4" ,qt-4)
        ("sqlite" ,sqlite)))