ELBE build fails while execution of postinst script

[waschhauser]

When trying to install python3-probe-basic during an ELBE build the postinst script fails because the variables SUDO_USER and USER are not set. It's not possible to set this variables and the ELBE workflow first installs all packages, afterwards the users are created.

Setting up python3-probe-basic (0.6.0-19.dev) ...
pmstatus:python3-probe-basic:99.1302:Preparing to configure python3-probe-basic (arm64)
pmstatus:python3-probe-basic:99.1574:Configuring python3-probe-basic (arm64)
sudo: unknown user mkdir
sudo: error initializing audit plugin sudoers_audit
dpkg: error processing package python3-probe-basic (--configure):
installed python3-probe-basic package post-installation script subprocess returned error exit status 1
pmerror:python3-probe-basic:99.1574:installed python3-probe-basic package post-installation script subprocess returned error exit status 1