Comment 12 for bug 1732030

Had the same issue, but wihtout libnss-libvirt installed. Switching to the mirror method also triggers the error.

# sed -i 's/http:\/\/archive.ubuntu.com\/ubuntu\//mirror:\/\/mirrors.ubuntu.com\/mirrors.txt/g' /etc/apt/sources.list
# apt update
0% [Working]
 **** Seccomp prevented execution of syscall 0000000078 on architecture amd64 ****
Reading package lists... Done
E: Method mirror has died unexpectedly!
E: Sub-process mirror returned an error code (31)