diff --git a/flake.nix b/flake.nix
index a5df0b3fb960c7bd9ca0c59de1bd0c6975ca4f23..3b6a26562c3702b2c8b315ba2ca857dd2ef4f71d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -108,12 +108,6 @@
               pkgs.gzip # gunzip
             ];
           };
-          gen-simu-instances = pkgs.mkShell {
-            buildInputs = [
-              packages.python-scripts
-              pkgs.jq # jq
-            ];
-          };
           py-scripts = pkgs.mkShell {
             buildInputs = [
               packages.python-scripts