scripts – Dpkg install file to specify variable target dir

I have a package with .install file in /Debian that copies data files. I want the files to be installed in ${HOME}/Documents/etc
The .install file is

#!/usr/bin/dh-exec
usr/bin/my_files*
${HOME}/Documents/presets/* => /${HOME}/Documents/presets

But dpkg-buildpackage parses and replaces the target path with hard-coded values captured on the building host. Obviously those paths can’t work on other PCs, so I want to modify the rule so that the target location will be established during installation and not build phase. Can you advise?
Thanks in advance