18/32: gnu: cereal: Update phase style.

[Tobias Geerinckx-Rice]

nckx pushed a commit to branch master
in repository guix.

commit 3592937550affcfe1dc1b5de46d159e834c3a74f
Author: Tobias Geerinckx-Rice <address@hidden>
Date:   Sun Mar 11 20:14:47 2018 +0100

    gnu: cereal: Update phase style.
    
    * gnu/packages/serialization.scm (cereal)[arguments]: Substitute INVOKE
    for SYSTEM* and end phases with #t.
---
 gnu/packages/serialization.scm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/serialization.scm b/gnu/packages/serialization.scm
index 131d682..9bbac3a 100644
--- a/gnu/packages/serialization.scm
+++ b/gnu/packages/serialization.scm
@@ -70,7 +70,8 @@
           (lambda _
             (substitute* "doc/doxygen.in"
               (("@CMAKE_CURRENT_SOURCE_DIR@") "."))
-            (zero? (system* "doxygen" "doc/doxygen.in"))))
+            (invoke "doxygen" "doc/doxygen.in")
+            #t))
          ;; There is no "install" target, so we have to provide our own
          ;; "install" phase.
          (replace 'install