diff --git a/gsm.spec b/gsm.spec
index 7a36810..e5b0570 100644
--- a/gsm.spec
+++ b/gsm.spec
@@ -66,36 +66,36 @@ export RPM_OPT_FLAGS="$RPM_OPT_FLAGS -fPIC";
 make %{?_smp_mflags} all
 
 %install
-rm -rf $RPM_BUILD_ROOT
+rm -rf %{buildroot}
 
-mkdir -p $RPM_BUILD_ROOT%{_bindir}
-mkdir -p $RPM_BUILD_ROOT%{_includedir}/gsm
-mkdir -p $RPM_BUILD_ROOT%{_libdir}
-mkdir -p $RPM_BUILD_ROOT%{_mandir}/{man1,man3}
+mkdir -p %{buildroot}%{_bindir}
+mkdir -p %{buildroot}%{_includedir}/gsm
+mkdir -p %{buildroot}%{_libdir}
+mkdir -p %{buildroot}%{_mandir}/{man1,man3}
 
 make install \
-	INSTALL_ROOT=$RPM_BUILD_ROOT%{_prefix} \
-	GSM_INSTALL_INC=$RPM_BUILD_ROOT%{_includedir}/gsm \
-	GSM_INSTALL_LIB=$RPM_BUILD_ROOT%{_libdir}
+	INSTALL_ROOT=%{buildroot}%{_prefix} \
+	GSM_INSTALL_INC=%{buildroot}%{_includedir}/gsm \
+	GSM_INSTALL_LIB=%{buildroot}%{_libdir}
 
-cp -p $RPM_BUILD_DIR/gsm-%{srcver}/lib/libgsm.so.%{soname} $RPM_BUILD_ROOT%{_libdir}
-ln -s libgsm.so.%{soname} $RPM_BUILD_ROOT%{_libdir}/libgsm.so.1
-ln -s libgsm.so.%{soname} $RPM_BUILD_ROOT%{_libdir}/libgsm.so
+cp -p $RPM_BUILD_DIR/gsm-%{srcver}/lib/libgsm.so.%{soname} %{buildroot}%{_libdir}
+ln -s libgsm.so.%{soname} %{buildroot}%{_libdir}/libgsm.so.1
+ln -s libgsm.so.%{soname} %{buildroot}%{_libdir}/libgsm.so
 
 # some apps look for this in /usr/include
-ln -s gsm/gsm.h $RPM_BUILD_ROOT%{_includedir}
+ln -s gsm/gsm.h %{buildroot}%{_includedir}
 
-rm -f $RPM_BUILD_ROOT%{_libdir}/lib*.a
+rm -f %{buildroot}%{_libdir}/lib*.a
 
 
 %check
 # This is to ensure that the patch creates the proper library version.
-[ -f $RPM_BUILD_ROOT%{_libdir}/libgsm.so.%{soname} ]
+[ -f %{buildroot}%{_libdir}/libgsm.so.%{soname} ]
 make addtst
 
 
 %clean
-rm -rf $RPM_BUILD_ROOT
+rm -rf %{buildroot}
 
 %post -p /sbin/ldconfig