default.nix

{ stdenv, fetchFromGitHub, pkgconfig, vpnc, openssl ? null, gnutls ? null, gmp, libxml2, stoken, zlib } :

assert (openssl != null) == (gnutls == null);

let
  version = "7.08";
  name = "openconnect_pa-${version}";
in stdenv.mkDerivation {
  inherit name;

  src = fetchFromGitHub {
    owner = "dlenski";
    repo = "openconnect";
    rev = "e5fe063a087385c5b157ad7a9a3fa874181f6e3b";
    sha256 = "0ywacqs3nncr2gpjjcz2yc9c6v4ifjssh0vb07h0qff06whqhdax"; 
  };

  outputs = [ "out" ];

  preConfigure = ''

  '';

  configureFlags = [

  ];

  postInstall = ''
    ldconfig
  '';

  nativeBuildInputs = [ pkgconfig ];
  propagatedBuildInputs = [ vpnc openssl gnutls gmp libxml2 stoken zlib ];
  
  meta = {
    description = "OpenConnect client extended to support Palo Alto Networks' GlobalProtect VPN";
    homepage = https://github.com/dlenski/openconnect/;
    license = stdenv.lib.licenses.lgpl21;
    maintainers = with stdenv.lib.maintainers; [ chessai ];
    platforms = stdenv.lib.platforms.linux;
  };
}

nix-repl.bash

Loading 'default.nix'...
Added 9690 variables.

nix-repl> :b openconnect_pa
builder for '/nix/store/kaa159v1hydwmh8xgg4dxdgsmlywfmfv-openconnect_pa-7.08.drv' failed with exit code 2; last 10 log lines:
  unpacking source archive /nix/store/kwljxpp6b0iw72r4x8pd0yaqw0p55g50-source
  source root is source
  patching sources
  configuring
  no configure script, doing nothing
  building
  no Makefile, doing nothing
  installing
  install flags: pkgconfigdir=/nix/store/hq6g6g1q88c0aqzmmhfrnbj7a3k29qd0-openconnect_pa-7.08-dev/lib/pkgconfig m4datadir=/nix/store/hq6g6g1q88c0aqzmmhfrnbj7a3k29qd0-openconnect_pa-7.08-dev/share/aclocal aclocaldir=/nix/store/hq6g6g1q88c0aqzmmhfrnbj7a3k29qd0-openconnect_pa-7.08-dev/share/aclocal install
  make: *** No rule to make target 'install'.  Stop.
[0 built (1 failed)]
error: build of '/nix/store/kaa159v1hydwmh8xgg4dxdgsmlywfmfv-openconnect_pa-7.08.drv' failed