What were you trying to do that didn't work?

Rear recover after taking successful backup.

Please provide the package NVR for which bug is seen:

rear-2.6-20.el9_3.x86_64

How reproducible:

Always.

Steps to reproduce

1.  Create a 'ReaR' backup with parameter to export TMPDIR in '/'.
   ~~~
    cat /etc/rear/site.conf 
   OUTPUT=ISO
   OUTPUT_URL=nfs://X.X.X.X/rear
   BACKUP=NETFS
   BACKUP_URL=nfs://X.X.X.X/rear
   BACKUP_PROG_EXCLUDE=("${BACKUP_PROG_EXCLUDE[@]}" '/media' '/var/tmp' '/var/crash' '/ISO')
   NETFS_KEEP_OLD_BACKUP_COPY=n
   AUTOEXCLUDE_MULTIPATH=n
   export TMPDIR="/ISO"                                                      <========
   ONLY_INCLUDE_VG=( "rhel" )
   ~~~

1. Try to recover with backup taken with above configuration by booting with rear ISO file, it fails with "ERROR: Could not create build area"  and fails to mount /ISO TMPDIR in recovery.

WORKAROUND : 
=============

• Create  TMPDIR in rescue shell before recovering server. 
  ~~~
  #mkdir /ISO
  #rear recover -vD                                        <=== Runs successfully.
  ~~~

  Expected results

To successfully proceed to recover the backup taken.

Actual results

ERROR: Could not create build area