I am getting error while running make command for buildroot
I am not sure what problem is?

sudhanshu@Sudhanshu:~/side_works/backup/buildroot$ sudo make

The error msg i’m getting

>>> skeleton-init-common  Installing to staging directory
rsync -a --ignore-times --exclude .svn --exclude .git --exclude .hg --exclude .bzr --exclude CVS --chmod=u=rwX,go=rX --exclude .empty --exclude '*~' system/skeleton/ /home/sudhanshu/side_works/backup/buildroot/output/host/x86_64-buildroot-linux-gnu/sysroot/
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/group": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/hosts": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/passwd": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/profile": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/protocols": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/services": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/shadow": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/profile.d/umask.sh": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/group": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/hosts": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/passwd": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/profile": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/protocols": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/services": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/shadow": Operation not permitted (1)
rsync: read errors mapping "/home/sudhanshu/side_works/backup/buildroot/system/skeleton/etc/profile.d/umask.sh": Operation not permitted (1)
ERROR: etc/group failed verification -- update discarded.
ERROR: etc/hosts failed verification -- update discarded.
ERROR: etc/passwd failed verification -- update discarded.
ERROR: etc/profile failed verification -- update discarded.
ERROR: etc/protocols failed verification -- update discarded.
ERROR: etc/services failed verification -- update discarded.
ERROR: etc/shadow failed verification -- update discarded.
ERROR: etc/profile.d/umask.sh failed verification -- update discarded.
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1205) [sender=3.1.3]
make: *** [package/pkg-generic.mk:322: /home/sudhanshu/side_works/backup/buildroot/output/build/skeleton-init-common/.stamp_staging_installed] Error 23

I am expecting successsful build but getting error for the command rsync used somewhere in the buildroot.