{ callPackage, fetchurl, fetchpatch, autoreconfHook }:
let
  common = opts: callPackage (import ./common.nix opts) {};
in {

  openssh = common rec {
    pname = "openssh";
    version = "8.6p1";

    src = fetchurl {
      url = "mirror://openbsd/OpenSSH/portable/openssh-${version}.tar.gz";
      sha256 = "1bnpivgk98h2f9afpp88jv6g9ps83vnpxd031n2jqxi12vdf9rn3";
    };

    extraPatches = [ ./ssh-keysign-8.5.patch ];
  };

  openssh_hpn = common rec {
    pname = "openssh-with-hpn";
    version = "8.4p1";
    extraDesc = " with high performance networking patches";

    src = fetchurl {
      url = "https://github.com/rapier1/openssh-portable/archive/hpn-KitchenSink-${builtins.replaceStrings [ "." "p" ] [ "_" "_P" ] version}.tar.gz";
      sha256 = "1x2afjy1isslbg7qlvhhs4zhj2c8q2h1ljz0fc5b4h9pqcm9j540";
    };

    extraPatches = [
      ./ssh-keysign-8.4.patch

      # See https://github.com/openssh/openssh-portable/pull/206
      ./ssh-copy-id-fix-eof.patch
    ];

    extraNativeBuildInputs = [ autoreconfHook ];

    extraMeta.knownVulnerabilities = [
      "CVE-2021-28041"
    ];
  };

  openssh_gssapi = common rec {
    pname = "openssh-with-gssapi";
    version = "8.4p1";
    extraDesc = " with GSSAPI support";

    src = fetchurl {
      url = "mirror://openbsd/OpenSSH/portable/openssh-${version}.tar.gz";
      sha256 = "091b3pxdlj47scxx6kkf4agkx8c8sdacdxx8m1dw1cby80pd40as";
    };

    extraPatches = [
      ./ssh-keysign-8.4.patch

      # See https://github.com/openssh/openssh-portable/pull/206
      ./ssh-copy-id-fix-eof.patch

      (fetchpatch {
        name = "openssh-gssapi.patch";
        url = "https://salsa.debian.org/ssh-team/openssh/raw/debian/1%25${version}-2/debian/patches/gssapi.patch";
        sha256 = "1z1ckzimlkm1dmr9f5fqjnjg28gsqcwx6xka0klak857548d2lp2";
      })
    ];

    extraNativeBuildInputs = [ autoreconfHook ];

    extraMeta.knownVulnerabilities = [
      "CVE-2021-28041"
    ];
  };
}