diff --git a/pkgs/tools/misc/glasgow/default.nix b/pkgs/tools/misc/glasgow/default.nix
index 2718fc49689f..470f4016e5dd 100644
--- a/pkgs/tools/misc/glasgow/default.nix
+++ b/pkgs/tools/misc/glasgow/default.nix
@@ -33,6 +33,7 @@ python3.pkgs.buildPythonApplication rec {
     crc
     fx2
     libusb1
+    packaging
     pyvcd
     setuptools
   ];