Error when running `make -j$(nproc) deb-pkg`

[BolunDai0216]

Hi,

I was trying to compile the real time kernel. After following the steps here, I got an error when running make -j$(nproc) deb-pkg:

make -j$(nproc) deb-pkg
scripts/kconfig/conf  --syncconfig Kconfig
  UPD     include/config/kernel.release
make clean
sh ./scripts/package/mkdebian
  TAR     linux-5.9.1-rt20.tar.gz
origversion=$(dpkg-parsechangelog -SVersion |sed 's/-[^-]*$//');\
	mv linux-5.9.1-rt20.tar.gz ../linux-5.9.1-rt20_${origversion}.orig.tar.gz
dpkg-buildpackage -r"fakeroot -u" -a$(cat debian/arch)  -i.git -us -uc
dpkg-buildpackage: error: fakeroot not found, either install the fakeroot
package, specify a command with the -r option, or run this as root
make[1]: *** [scripts/Makefile.package:77: deb-pkg] Error 255
make: *** [Makefile:1523: deb-pkg] Error 2

Any idea how to fix this, should I run under sudo?

Thanks in advance!

[BolunDai0216]

Looks like the issue is I didn't install a package called fakeroot, you can install it using

sudo apt install fakeroot

that solved my issue.