Fails to run with hardening flags
See cherrypicker/buffyboard#22 (moved) for a Clang report.
In my case, the package didn't work on NixOS without hardeningDisable = [ "fortify3" ];
. "fortify3" sets -D_FORTIFY_SOURCE=3
for GCC, if it's disabled, -D_FORTIFY_SOURCE=2
is passed, which still works.