Make build command error

getting below error while using make build cmd to make rpm package.
followed document to make rpm package. any pointer about error would be helpfull.

Finish: dnf install
ERROR: Exception(linux.spec) Config(clear) 0 minutes 18 seconds
INFO: Results and/or logs in: results/
ERROR: Command failed:

/usr/bin/systemd-nspawn -q -M edd602fbd8de4bac9337e842e93226ec -D /var/lib/mock/clear-linux/root -a --setenv=TERM=vt100 --setenv=SHELL=/bin/bash --setenv=HOME=/builddir --setenv=HOSTNAME=mock --setenv=PATH=/usr/bin:/bin:/usr/sbin:/sbin --setenv=PROMPT_COMMAND=printf “\033]0;\007” --setenv=PS1= \s-\v$ --setenv=LANG=en_US.UTF-8 /usr/sbin/useradd -m -u 0 -g 302 -d /builddir mockbuild

make: *** […/common/Makefile.common:120: results/linux-5.10.5-1012.src.rpm] Error 4