diff --git a/flake.nix b/flake.nix
index 5b524c1..147c159 100644
--- a/flake.nix
+++ b/flake.nix
@@ -59,7 +59,7 @@
           };
 
           packages.conda-custom = pkgs.conda.override {
-            extraPkgs = with pkgs; [ glib ];
+            extraPkgs = with pkgs; [ glib which ];
           };
 
           devShells = {