Merge pull request #549 from jam7/fix-preconfiguration-bug

Fix a bug not removing CREW_DEST_DIR/* before the preconfiguration

crew

@@ -221,7 +221,7 @@ def build_and_preconfigure (target_dir)
     @pkg.in_build = true
     @pkg.build
     @pkg.in_build = false
-    system "rm -rf", CREW_DEST_DIR + "/*" #wipe crew destdir
+    system "rm -rf #{CREW_DEST_DIR}/*" #wipe crew destdir
     puts "Preconfiguring package..."
     @pkg.install
   end