Cannot run manual deploy workflow

[Trophime]

Hi @vsoch ,
I've tried the manual deploy workflow for the attached recipe.
It fails with following error:

ERROR  : Failed to create user namespace: user namespace requires to set /proc/sys/kernel/unprivileged_userns_clone to 1
FATAL:   While performing build: while running engine: exit status 1
Error: Process completed with exit code 255.

I guess this has something to do with the quay.io/singularity/singularity:v3.8.3 image?

Best, C.

recipe.txt