diff --git a/nixos/shell.nix b/nixos/shell.nix
index aa16f9d..d59d529 100644
--- a/nixos/shell.nix
+++ b/nixos/shell.nix
@@ -88,6 +88,7 @@
         tmpfile = $(mktemp)
         gh copilot alias -- bash > @(tmpfile)
         source-bash @(tmpfile)
+        ulimit -n 4096
       '';
       package = pkgs.xonsh.override {
         extraPackages = ps: [