• root@debian:~# apt-get source nginx
    Reading package lists… Done
    Need to get 1,091 kB of source archives.
    Get:1 http://nginx.org/packages/debian stretch/nginx nginx 1.12.2-1~stretch (dsc) [1,511 B]
    Get:2 http://nginx.org/packages/debian stretch/nginx nginx 1.12.2-1~stretch (tar) [982 kB]
    Get:3 http://nginx.org/packages/debian stretch/nginx nginx 1.12.2-1~stretch (diff) [108 kB]
    Fetched 1,091 kB in 0s (1,719 kB/s)
    dpkg-source: info: extracting nginx in nginx-1.12.2
    dpkg-source: info: unpacking nginx_1.12.2.orig.tar.gz
    dpkg-source: info: unpacking nginx_1.12.2-1~stretch.debian.tar.xz
    W: Download is performed unsandboxed as root as file ‘nginx_1.12.2-1~stretch.dsc’ couldn’t be accessed by user ‘_apt’. – pkgAcquire::Run (13: Permission denied)