[Nix-dev] pybitmessage python help

[Tomas Hlavaty]

Hi,

I'm writing a nix expression for PyBitMessage:

{stdenv, fetchgit, python27, qt4, pyqt4, sqlite, openssl, mpg123}:

stdenv.mkDerivation rec {
  name = "pybitmessage-v0.4.4";

  src = fetchgit {
    url = "https://github.com/Bitmessage/PyBitmessage.git";
    rev = "713ed89467b9c766cb22df0cc51415a93fd1801d";
    sha256 = "0d70xj0bap7dwh1lj8fj0k0hwhfnzgz2g5jlh2sgqpaqpd74q1dq";
  };

  #pythonPath = [pyqt4];

  #buildInputs = [python27 pythonPackages.wrapPython];

  propagatedBuildInputs = [qt4 pyqt4 sqlite openssl mpg123];

  installPhase = ''
    mkdir -p $out/share/pybitmessage
    cp -r src/* $out/share/pybitmessage/
    mkdir -p $out/bin
    ln -s $out/share/pybitmessage/bitmessagemain.py $out/bin/pybitmessage
  '';

  meta = with stdenv.lib; { 
    homepage = https://bitmessage.org;
    description = "Bitmessage is a P2P communications protocol";
    license = licenses.mit;
  };
}

However, python cannot find pyqt4:

% pybitmessage 
pybitmessage 
Loading existing config files from /home/tomas/.config/PyBitmessage/
2015-04-28 23:23:44,401 - DEBUG - Database file already exists.
2015-04-28 23:23:44,656 - DEBUG - Loaded 0 objects from disk into the objectProcessorQueue.
2015-04-28 23:23:44,657 - DEBUG - reloading keys from keys.dat file
2015-04-28 23:23:44,766 - DEBUG - reloading subscriptions...
An Exception occurred within isOurOperatingSystemLimitedToHavingVeryFewHalfOpenConnections: invalid version number '#1 SMP PREEMPT Wed Apr 8 14:10:00 CEST 2015'
PyBitmessage requires PyQt unless you want to run it as a daemon and interact with it using the API. You can download PyQt from http://www.riverbankcomputing.com/software/pyqt/download   or by searching Google for 'PyQt Download'. If you want to run in daemon mode, see https://bitmessage.org/wiki/Daemon
('Error message:', ImportError('No module named PyQt4',))
You can also run PyBitmessage with the new curses interface by providing
'-c' as a commandline argument.


I tried searching nixpkgs and trying things but have not managed to
figure it out.  Does somebody have an idea, how to get it to work?

Thanks a lot,

Tomas