fakeroot binary package in Ubuntu Bionic amd64

 fakeroot provides a fake "root environment" by means of LD_PRELOAD and
 SysV IPC (or TCP) trickery. It puts wrappers around getuid(), chown(),
 stat(), and other file-manipulation functions, so that unprivileged
 users can (for instance) populate .deb archives with root-owned files;
 various build tools use fakeroot for this by default.
 .
 This package contains fakeroot command and the daemon that remembers
 fake ownership/permissions of files manipulated by fakeroot
 processes.

Source package