-if exist $(GLibEtcInstallRoot)\bin\glib-genmarshal $(PythonDir)\python $(GLibEtcInstallRoot)\bin\glib-genmarshal --prefix=atk_marshal --quiet --header --output=atkmarshal.h atkmarshal.list
-if not exist atkmarshal.h $(GLibEtcInstallRoot)\bin\glib-genmarshal --prefix=atk_marshal atkmarshal.list --header --output=atkmarshal.h
-if exist $(GLibEtcInstallRoot)\bin\glib-genmarshal $(PythonDir)\python $(GLibEtcInstallRoot)\bin\glib-genmarshal --prefix=atk_marshal --quiet --body --output=atkmarshal.c atkmarshal.list
-if not exist atkmarshal.c $(GLibEtcInstallRoot)\bin\glib-genmarshal --prefix=atk_marshal atkmarshal.list --body --output=atkmarshal.c
+$(PythonDir)\python $(GLibEtcInstallRoot)\bin\glib-genmarshal --prefix=atk_marshal --quiet --header --output=atkmarshal.h atkmarshal.list 2>nul & set ERRORLEVEL=0
+if not exist atkmarshal.h $(GLibEtcInstallRoot)\bin\glib-genmarshal --prefix=atk_marshal atkmarshal.list --header > atkmarshal.h
+$(PythonDir)\python $(GLibEtcInstallRoot)\bin\glib-genmarshal --prefix=atk_marshal --quiet --body --output=atkmarshal.c atkmarshal.list 2>nul & set ERRORLEVEL=0
+if not exist atkmarshal.c $(GLibEtcInstallRoot)\bin\glib-genmarshal --prefix=atk_marshal atkmarshal.list --body > atkmarshal.c