diff --git a/flake.nix b/flake.nix
index 26a1621..15c17e8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -33,6 +33,7 @@
 
         pkgs.just # command runner
         pkgs.biber # bibliography backend
+        pkgs.gnuplot
       ];
     };