[Linux] runfile inst. => must be root to install in non standard location (that belongs to me)

Hello,
I use the installation with the runfile.
I try to install cuda_12.6.2_560.35.03 on a linux cluster running rhel 8 in a non standard location, (/opt/…) that belongs to me. This location is available for all computing nodes.

The command is :
$ ./cuda_12.6.2_560.35.03_linux.run --driver --toolkit --toolkitpath=/opt/software/cuda_12.6.2_560.35.03 --defaultroot=/opt/software/cuda_12.6.2_560.35.03

I accept the EULA
I check the different options for the driver and the toolkit.
I unselect the creation of symbolic links, the installation of some parts of the software in system’s locations like /usr/share/man, the creation of desktop menu shortcuts, etc …

If I look at the log file, I get :

cat /tmp/cuda-installer.log
[INFO]: Setting driver=true
[INFO]: Setting toolkit=true
[INFO]: Setting toolkitpath=/opt/software/cuda_12.6.2_560.35.03
[INFO]: Setting defaultpath=/opt/software/cuda_12.6.2_560.35.03
[INFO]: Driver not installed.
[INFO]: Checking compiler version...
[INFO]: gcc location: /usr/bin/gcc

[INFO]: gcc version: gcc version 8.5.0 20210514 (Red Hat 8.5.0-16) (GCC) 

[INFO]: Initializing menu
[INFO]: nvidia-fs.setKOVersion(2.22.3)
[INFO]: Updating toolkitpath for: CUDA Toolkit 12.6
[WARNING]: Unable to write to directory: /usr/share/applications/
[INFO]: Updating toolkitpath for: CUDA Libraries 12.6
[INFO]: Updating toolkitpath for: CUDA Development 12.6
[INFO]: Updating toolkitpath for: libcufft-dev
[INFO]: Updating toolkitpath for: libnvjpeg-dev
[INFO]: Updating toolkitpath for: libnvjitlink-dev
[INFO]: Updating toolkitpath for: libnvfatbin-dev
[INFO]: Updating toolkitpath for: libnpp-dev
[INFO]: Updating toolkitpath for: libcusparse-dev
[INFO]: Updating toolkitpath for: libcusolver-dev
[INFO]: Updating toolkitpath for: libcurand-dev
[INFO]: Updating toolkitpath for: libcufile-dev
[INFO]: Updating toolkitpath for: cuda-cccl
[INFO]: Updating toolkitpath for: libcublas-dev
[INFO]: Updating toolkitpath for: cuda-profiler-api
[INFO]: Updating toolkitpath for: cuda-opencl-dev
[INFO]: Updating toolkitpath for: cuda-nvrtc-dev
[INFO]: Updating toolkitpath for: cuda-nvml-dev
[INFO]: Updating toolkitpath for: cuda-driver-dev
[INFO]: Updating toolkitpath for: cuda-cudart-dev
[INFO]: Updating toolkitpath for: CUDA Runtime 12.6
[INFO]: Updating toolkitpath for: cuda-cudart
[INFO]: Updating toolkitpath for: cuda-nvrtc
[INFO]: Updating toolkitpath for: cuda-opencl
[INFO]: Updating toolkitpath for: libcublas12
[INFO]: Updating toolkitpath for: libcufft
[INFO]: Updating toolkitpath for: libcufile
[INFO]: Updating toolkitpath for: libcurand
[INFO]: Updating toolkitpath for: libcusolver
[INFO]: Updating toolkitpath for: libcusparse
[INFO]: Updating toolkitpath for: libnpp
[INFO]: Updating toolkitpath for: libnvfatbin
[INFO]: Updating toolkitpath for: libnvjitlink
[INFO]: Updating toolkitpath for: libnvjpeg
[INFO]: Setup complete
[INFO]: Initializing writeable menu
[INFO]: Initializing writeable menu
[INFO]: Installing: Driver
[ERROR]: Driver installation must be run as root.
[ERROR]: Install of Driver failed, quitting

=> I have seen nowhere anything related to “/usr/share/applications” that I can unselect.
=> Is it possible to get more informations about what produces the error message : “Driver installation must be run as root.” ?

thank you.