gnu: librecad: Build with qt-build-system.

* gnu/packages/engineering.scm (librecad)[build-system]: Switch to
qt-build-system.
[arguments]: Add test-target. Remove custom 'wrap-executable phase.

gnu/packages/engineering.scm

@@ -144,9 +144,10 @@
               (sha256
                (base32
                 "08cl4935c9vznz9qdw1zgd86rn7hl64zpfayxl07x21bhf53pn24"))))
-    (build-system gnu-build-system)
+    (build-system qt-build-system)
     (arguments
-     '(#:phases
+     '(#:test-target "check"
+       #:phases
        (modify-phases %standard-phases
          ;; Without this patch boost complains that "make_array" is not a
          ;; member of "boost::serialization".
@@ -186,19 +187,7 @@
                (install-file "unix/librecad" bin)
                (mkdir-p share)
                (copy-recursively "unix/resources" share))
-             #t))
-         ;; Ensure that icons are found at runtime
-         (add-after 'install 'wrap-executable
-           (lambda* (#:key inputs outputs #:allow-other-keys)
-             (let* ((out (assoc-ref outputs "out"))
-                    (qt '("qtbase" "qtsvg")))
-               (wrap-program (string-append out "/bin/librecad")
-                 `("QT_PLUGIN_PATH" ":" prefix
-                   ,(map (lambda (label)
-                           (string-append (assoc-ref inputs label)
-                                          "/lib/qt5/plugins/"))
-                         qt)))
-               #t))))))
+             #t)))))
     (inputs
      `(("boost" ,boost)
        ("muparser" ,muparser)