diff --git a/pkgs/tools/audio/beets/default.nix b/pkgs/tools/audio/beets/default.nix
index 0c6dc9219c47..60cfe4a28148 100644
--- a/pkgs/tools/audio/beets/default.nix
+++ b/pkgs/tools/audio/beets/default.nix
@@ -84,6 +84,7 @@ in pythonPackages.buildPythonApplication rec {
   };
 
   propagatedBuildInputs = [
+    pythonPackages.six
     pythonPackages.enum34
     pythonPackages.jellyfish
     pythonPackages.munkres