File checkinstall-set_buildroot.patch of Package checkinstall
Index: checkinstall
===================================================================
--- checkinstall.orig 2009-12-26 20:17:24.000000000 +0100
+++ checkinstall 2011-01-31 18:17:56.171593541 +0100
@@ -2463,7 +2463,7 @@ cd "$DIRECTORIO_FUENTE"
echo
echogn "Building RPM package..."
-$RPMBUILD -bb ${RPM_TARGET_FLAG}${ARCHITECTURE} "$SPEC_PATH" &> ${TMP_DIR}/rpmbuild.log
+$RPMBUILD --buildroot ${BUILDROOT} -bb ${RPM_TARGET_FLAG}${ARCHITECTURE} "$SPEC_PATH" &> ${TMP_DIR}/rpmbuild.log
okfail
if [ $? -gt 0 ]; then