--- a/setup.py	Thu Oct 22 14:26:00 2015 +0200
+++ b/setup.py	Mon Nov 09 18:26:05 2015 +0100
@@ -57,6 +57,7 @@
 LAUNCH_DAEMON_COMMAND = 'libervia'
 
 ENV_LIBERVIA_INSTALL = "LIBERVIA_INSTALL"  # environment variable to customise installation
+JS_DEBUG = "jsdebug" # use debug mode with pyjsbuild
 NO_PREINSTALL_OPT = 'nopreinstall'  # skip all preinstallation checks
 AUTO_DEB_OPT = 'autodeb'  # automaticaly install debs
 CLEAN_OPT = 'clean'  # remove previous installation directories
@@ -120,7 +121,8 @@
         os.symlink(os.path.dirname(sat_frontends.__file__), os.path.join(tmp_dir,"sat_frontends")) # FIXME: only work on unixes
         os.symlink(os.path.dirname(libervia.__file__), os.path.join(tmp_dir,"libervia")) # FIXME: only work on unixes
         for module in ('libervia_main', 'libervia_test'):
-            result = subprocess.call(['pyjsbuild', module, '-d', '--no-compile-inplace', '-I', tmp_dir, '-o', self.pyjamas_output_dir])
+            build_args = ['pyjsbuild', module] + (['-d'] if JS_DEBUG in install_opt else []) + ['--no-compile-inplace', '-I', tmp_dir, '-o', self.pyjamas_output_dir]
+            result = subprocess.call(build_args)
             if result != 0:
                 continue
         shutil.rmtree(tmp_dir)