diff --git a/mcstrans.spec b/mcstrans.spec
index 847d7e5..0a6fbf7 100644
--- a/mcstrans.spec
+++ b/mcstrans.spec
@@ -33,15 +33,15 @@ make clean
 make CFLAGS="-g %{optflags}"
 
 %install
-rm -rf ${RPM_BUILD_ROOT}
-mkdir -p ${RPM_BUILD_ROOT}/%{_lib} 
-mkdir -p ${RPM_BUILD_ROOT}/%{_libdir} 
-make DESTDIR="${RPM_BUILD_ROOT}" LIBDIR="${RPM_BUILD_ROOT}%{_libdir}" SHLIBDIR="${RPM_BUILD_ROOT}/%{_lib}" install
-rm -f ${RPM_BUILD_ROOT}%{_sbindir}/*
-rm -f ${RPM_BUILD_ROOT}%{_libdir}/*.a
+rm -rf %{buildroot}
+mkdir -p %{buildroot}/%{_lib} 
+mkdir -p %{buildroot}/%{_libdir} 
+make DESTDIR="%{buildroot}" LIBDIR="%{buildroot}%{_libdir}" SHLIBDIR="%{buildroot}/%{_lib}" install
+rm -f %{buildroot}%{_sbindir}/*
+rm -f %{buildroot}%{_libdir}/*.a
 
 %clean
-rm -rf ${RPM_BUILD_ROOT}
+rm -rf %{buildroot}
 
 %post 
 chkconfig --add mcstransd