[Nix-dev] My Hydra can't send mail

[Peter Simons]

Eelco Dolstra writes:

 > You probably need to change the line
 >
 >   path = [ pkgs.nettools pkgs.ssmtp ];
 >
 > in the Hydra module to
 >
 >   path = [ pkgs.nettools pkgs.postfix ];
 >
 > or something like that. Or maybe add the sendmail setuid wrapper to the path.

personally, I've found it useful to re-direct all users of ssmtp to
Postfix by including the following override in my configuration.nix
file:

  nixpkgs.config = {
    packageOverrides = pkgs: {
      ssmtp = pkgs.stdenv.mkDerivation {
        name = "sendmail-setuid-wrapper-0";
        buildCommand = ''
          mkdir -p $out/sbin
          echo  >$out/sbin/sendmail "#! $SHELL"
          echo >>$out/sbin/sendmail 'exec /var/setuid-wrappers/sendmail "$@"'
          chmod +x $out/sbin/sendmail
        '';
      };
    };
  };

That certainly works fine on hydra.cryp.to.

I hope this helps,
Peter