diff --git a/pkgs/applications/radio/gnss-sdr/default.nix b/pkgs/applications/radio/gnss-sdr/default.nix
index cc89ffb4f87..d7e2d44c75c 100644
--- a/pkgs/applications/radio/gnss-sdr/default.nix
+++ b/pkgs/applications/radio/gnss-sdr/default.nix
@@ -41,6 +41,7 @@ stdenv.mkDerivation rec {
     orc
     pkgconfig
     pythonPackages.Mako
+    pythonPackages.six
 
     # UHD support is optional, but gnuradio is built with it, so there's
     # nothing to be gained by leaving it out.