diff --git a/pkgs/by-name/de/densify/package.nix b/pkgs/by-name/de/densify/package.nix
index ecc05ae8e25b..5affbd4fc99f 100644
--- a/pkgs/by-name/de/densify/package.nix
+++ b/pkgs/by-name/de/densify/package.nix
@@ -8,6 +8,7 @@
   xorg,
   gnugrep,
   ghostscript,
+  libnotify,
 }:
 
 python3Packages.buildPythonApplication rec {
@@ -44,6 +45,7 @@ python3Packages.buildPythonApplication rec {
           ghostscript
           gnugrep
           xorg.xrandr
+          libnotify
         ]
       }"
     )