diff -urN rpm-5.4.9/macros/macros.rpmbuild.in rpm-5.4.9-patched/macros/macros.rpmbuild.in
--- rpm-5.4.9/macros/macros.rpmbuild.in 2012-08-25 12:37:14.939808237 +1100
+++ rpm-5.4.9-patched/macros/macros.rpmbuild.in 2012-08-25 12:36:37.302808636 +1100
@@ -329,6 +329,8 @@
   RPM_BUILD_DIR=\"%{realpath:%{u2p:%{_builddir}}}\"\
   RPM_OPT_FLAGS=\"%{optflags}\"\
   export RPM_BUILD_DIR RPM_OPT_FLAGS\
+  RPM_PACKAGE_NAME=\"%{name}\"\
+  export RPM_BUILD_DIR RPM_OPT_FLAGS RPM_PACKAGE_NAME\
   %{?buildroot:RPM_BUILD_ROOT=\"%{u2p:%{buildroot}}\"\
   export RPM_BUILD_ROOT}\
   %{?_javaclasspath:CLASSPATH=\"%{_javaclasspath}\"\