gnuradio: incomplete dependencies for gnuradio-companion

[rkoe]

Describe the bug
gnuradio-companion does not work; it looks like it cannot find some Python modules / the PYTHONPATH is incomplete.

To Reproduce
Steps to reproduce the behavior:

1. Install gnuradio: nix-env -iA nixos.gnuradio-with-packages or gnuradio-companion
2. Try to start gnuradio-companion:

   $ gnuradio-companion
   ImportError
   
   Failed to initialize GTK. If you are running over ssh, did you enable X forwarding and start ssh with -X?
   
   (No module named gtk)
   

Metadata

• system: "x86_64-linux"
• host os: Linux 5.4.39, NixOS, 20.03.1795.d6c1b566b77 (Markhor)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.3.4
• channels(root): "nixos-20.03.1795.d6c1b566b77"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

[doronbehar]

Yea gnuradio is pretty broken and outdated. See #82263 .

[povik]

Should someone need GNU Radio 3.7 before this issue is fixed, these derivations I put together might be helpful.

[JustWhateverIOnlyWantBetterCodeView]

This issue is still present today. (or did it arrive again in the meantime?)

[mdvmeijer]

After updating my system I have this problem as well. It seems to have been introduced (again?) sometime in the last few weeks.

[doronbehar]

You are correct, this bug slipped into the channels recently but was recently fixed. See http://nixpk.gs/pr-tracker.html?pr=312173 .