dell build failure

gistfile1.txt

Building dell_rbu...
cp: cannot stat '/opt/dell/srvadmin//src/srvadmin-hapi/dks/dell_rbu/*.c': No such file or directory
cp: cannot stat '/opt/dell/srvadmin//src/srvadmin-hapi/dks/dell_rbu/*.h': No such file or directory
cp: cannot stat '/opt/dell/srvadmin//src/srvadmin-hapi/dks/dell_rbu/kernel26/*.h': No such file or directory
make: Entering directory '/usr/src/linux-headers-4.9.0-0.bpo.5-amd64'
  CC [M]  /opt/dell/srvadmin/var/lib/openmanage/drivers/x86_64/dks/build/esm/dell_rbu.o
/opt/dell/srvadmin/var/lib/openmanage/drivers/x86_64/dks/build/esm/dell_rbu.c:37:26: fatal error: linux/config.h: No such file or directory
 #include <linux/config.h>
                          ^
compilation terminated.
/usr/src/linux-headers-4.9.0-0.bpo.5-common/scripts/Makefile.build:304: recipe for target '/opt/dell/srvadmin/var/lib/openmanage/drivers/x86_64/dks/build/esm/dell_rbu.o' failed
make[3]: *** [/opt/dell/srvadmin/var/lib/openmanage/drivers/x86_64/dks/build/esm/dell_rbu.o] Error 1
/usr/src/linux-headers-4.9.0-0.bpo.5-common/Makefile:1510: recipe for target '_module_/opt/dell/srvadmin/var/lib/openmanage/drivers/x86_64/dks/build/esm' failed
make[2]: *** [_module_/opt/dell/srvadmin/var/lib/openmanage/drivers/x86_64/dks/build/esm] Error 2
Makefile:150: recipe for target 'sub-make' failed
make[1]: *** [sub-make] Error 2
Makefile:8: recipe for target 'all' failed
make: *** [all] Error 2
make: Leaving directory '/usr/src/linux-headers-4.9.0-0.bpo.5-amd64'
dell_rbu compile failed