self: super: rec {
  mariadb = mariadbPAM;
  mariadbPAM = super.mariadb.overrideAttrs(old: {
    cmakeFlags = old.cmakeFlags ++ [ "-DWITH_AUTHENTICATION_PAM=ON" ];
    buildInputs = old.buildInputs ++ [ self.pam ];
    postInstall = old.postInstall + ''
      # FIXME: hack because mariadb cannot find dialog.so
      # fixed in 20.03: https://github.com/NixOS/nixpkgs/pull/80768
      ln -s /nix $out/nix
      cp "$dev"/lib/mysql/plugin/{caching_sha2_password.so,dialog.so,mysql_clear_password.so,sha256_password.so} "$out"/lib/mysql/plugin
      '';
  }) // (with super.mariadb; {
    inherit client;
    servier = super.mariadb;
    inherit connector-c;
    inherit galera;
  });
}