Doesn't build

[Jak2k]

make -C utils V4L2LOOPBACK_SNAPSHOT_VERSION=snapshot
make[1]: Entering directory '/workdir/utils'
cc  -I.. -DSNAPSHOT_VERSION='"snapshot"'  -c -o v4l2loopback-ctl.o v4l2loopback-ctl.c
cc   v4l2loopback-ctl.o   -o v4l2loopback-ctl
make[1]: Leaving directory '/workdir/utils'
[2/2] STEP 9/11: RUN rm -rf ./build/v4l2loopback
[2/2] STEP 10/11: RUN mkdir -p ./build/v4l2loopback
mkdir: cannot create directory './build/v4l2loopback': Permission denied
Error: building at STEP "RUN mkdir -p ./build/v4l2loopback": while running runtime: exit status 1

[moacirrf]

You dont have permission to create ./build/v4l2loopback
1- Verify if build directory was created and if you have permissions to write on it

2- Maybe SELinux is blocking, check if SELINUX is enabled, run the command:
getenforce
If activated try disable it:
https://www.geeksforgeeks.org/how-to-enable-or-disable-selinux-in-different-modes/