diff --git a/third_party/nix/default.nix b/third_party/nix/default.nix
index 3403b1a14..a8b44208b 100644
--- a/third_party/nix/default.nix
+++ b/third_party/nix/default.nix
@@ -71,6 +71,9 @@ in lib.fix (self: pkgs.llvmPackages.libcxxStdenv.mkDerivation {
   doCheck = false;
   doInstallCheck = true;
 
+  # Preserve debug symbols, for core dumps + other live debugging
+  dontStrip = true;
+
   installCheckInputs = with pkgs; [
     fd
     gtest