Udocker fails when trying to run it with singularity inside blink

[SerJaimeLannister]

I was trying as an experiment to run udocker inside blink https://github.com/jart/blink/
No other mode actually works except singularity and it shows this error then , this definitely felt outside the scope of opening a issue on blink but rather this feels like the issue is on the side of udocker / apptainer

blink udocker run 7f8d5bba-38ea-384f-a963-d3cda77c8f35
//////////////////////////////////////////////////////////////////////////////
/ /
/ STARTING 7f8d5bba-38ea-384f-a963-d3cda77c8f35 /
/ / //////////////////////////////////////////////////////////////////////////////
executing: sh
WARNING: failed to set O_CLOEXEC flags on image
INFO: Environment variable SINGULARITYENV_PATH is set, but APPTAINERENV_PATH is preferred
INFO: Environment variable SINGULARITYENV_HOME is set, but APPTAINERENV_HOME is preferred
INFO: Environment variable SINGULARITYENV_USER is set, but APPTAINERENV_USER is preferred
INFO: Environment variable SINGULARITYENV_LOGNAME is set, but APPTAINERENV_LOGNAME is preferred
INFO: Environment variable SINGULARITYENV_USERNAME is set, but APPTAINERENV_USERNAME is preferred
INFO: Environment variable SINGULARITYENV_PS1 is set, but APPTAINERENV_PS1 is preferred
INFO: Environment variable SINGULARITYENV_SHLVL is set, but APPTAINERENV_SHLVL is preferred
INFO: Environment variable SINGULARITYENV_container_ruser is set, but APPTAINERENV_container_ruser is preferred
INFO: Environment variable SINGULARITYENV_container_root is set, but APPTAINERENV_container_root is preferred
INFO: Environment variable SINGULARITYENV_container_uuid is set, but APPTAINERENV_container_uuid is preferred
INFO: Environment variable SINGULARITYENV_container_execmode is set, but APPTAINERENV_container_execmode is preferred
INFO: Environment variable SINGULARITYENV_container_names is set, but APPTAINERENV_container_names is preferred
WARNING: Overriding HOME environment variable with SINGULARITYENV_HOME is not permitted
ERROR : Failed to spawn stage 1