gnu: qt@4: Use invoke.

* gnu/packages/qt.scm (qt@4)[arguments]: Use invoke.

gnu/packages/qt.scm

@@ -433,7 +433,7 @@ system, and the core design of Django is reused in Grantlee.")
               (substitute* "src/corelib/global/global.pri"
                 (("/bin/ls") (which "ls")))
 
-              (zero? (system*
+              (invoke
                 "./configure"
                 "-verbose"
                 "-prefix" out
@@ -476,7 +476,7 @@ system, and the core design of Django is reused in Grantlee.")
                 "-no-ssse3"
                 "-no-sse4.1"
                 "-no-sse4.2"
-                      "-no-avx")))))
+                "-no-avx"))))
          (add-after
           'install 'move-doc
           (lambda* (#:key outputs #:allow-other-keys)