/usr/ is in elpa-elisp-slime-nav 0.9-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/emacsen-common/
/usr/lib/emacsen-common/packages/
/usr/lib/emacsen-common/packages/compat/
/usr/lib/emacsen-common/packages/compat/elpa-elisp-slime-nav
/usr/lib/emacsen-common/packages/install/
/usr/lib/emacsen-common/packages/install/elpa-elisp-slime-nav
/usr/lib/emacsen-common/packages/remove/
/usr/lib/emacsen-common/packages/remove/elpa-elisp-slime-nav
/usr/share/
/usr/share/doc/
/usr/share/doc/elpa-elisp-slime-nav/
/usr/share/doc/elpa-elisp-slime-nav/README.md
/usr/share/doc/elpa-elisp-slime-nav/changelog.Debian.gz
/usr/share/doc/elpa-elisp-slime-nav/copyright
/usr/share/emacs/
/usr/share/emacs/site-lisp/
/usr/share/emacs/site-lisp/elpa-src/
/usr/share/emacs/site-lisp/elpa-src/elisp-slime-nav-0.9/
/usr/share/emacs/site-lisp/elpa-src/elisp-slime-nav-0.9/elisp-slime-nav-autoloads.el
/usr/share/emacs/site-lisp/elpa-src/elisp-slime-nav-0.9/elisp-slime-nav-pkg.el
/usr/share/emacs/site-lisp/elpa-src/elisp-slime-nav-0.9/elisp-slime-nav.el