/usr/ is in libefivar-dev 0.15-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/efivar-guids.h
/usr/include/efivar.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/efivar.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libefivar-dev/
/usr/share/doc/libefivar-dev/README
/usr/share/doc/libefivar-dev/changelog.Debian.gz
/usr/share/doc/libefivar-dev/copyright
/usr/share/doc/libefivar-dev/README.Debian
/usr/share/man/
/usr/share/man/man3/
/usr/share/man/man3/efi_get_variable.3.gz
/usr/lib/x86_64-linux-gnu/libefivar.so
/usr/share/man/man3/efi_guid_to_name.3.gz
/usr/share/man/man3/efi_append_variable.3.gz
/usr/share/man/man3/efi_get_variable_attributes.3.gz
/usr/share/man/man3/efi_variables_supported.3.gz
/usr/share/man/man3/efi_symbol_to_guid.3.gz
/usr/share/man/man3/efi_guid_to_symbol.3.gz
/usr/share/man/man3/efi_get_variable_size.3.gz
/usr/share/man/man3/efi_get_next_variable_name.3.gz
/usr/share/man/man3/efi_str_to_guid.3.gz
/usr/share/man/man3/efi_set_variable.3.gz
/usr/share/man/man3/efi_del_variable.3.gz
/usr/share/man/man3/efi_name_to_guid.3.gz
/usr/share/man/man3/efi_guid_to_str.3.gz