Interestingly this appears to be a long-standing issue as I can't find any version since Stretch that shows libesmtp-dev depending on libssl-dev.
Versions prior to 1.1.0 did not use pkg-config or Meson/Ninja build system for that matter. This was the first iteration of the new build system changes. Working on an updated version and hopefully will have it released shortly for you try. On Sun, Oct 24, 2021 at 8:09 AM Salvatore Bonaccorso <car...@debian.org> wrote: > Package: libesmtp-dev > Version: 1.1.0-2 > Severity: serious > Justification: Missing dependency > X-Debbugs-Cc: car...@debian.org > > Hi > > libesmtp-1.0.pc contains > > Requires.private: openssl >= 1.1.0 > > but the libesmtp-dev binary package misses a Depends on libssl-dev > accordingly. > > Accordingly: > > $ pkg-config --print-errors --exists libesmtp-1.0 > Package openssl was not found in the pkg-config search path. > Perhaps you should add the directory containing `openssl.pc' > to the PKG_CONFIG_PATH environment variable > Package 'openssl', required by 'libesmtp-1.0', not found > > Regards, > Salvatore >