fix(nix): keep runtime mode out of agent environment (#2697)

nix/package.nix

@@ -114,9 +114,10 @@ buildNpmPackage rec {
 
     # Create wrapper for the server entry point (for systemd / direct use)
     mkdir -p $out/bin
+    # Keep Paseo's runtime mode separate from NODE_ENV, which belongs to spawned agents.
     makeWrapper ${nodejs}/bin/node $out/bin/paseo-server \
       --add-flags "$out/lib/paseo/packages/server/dist/scripts/supervisor-entrypoint.js" \
-      --set NODE_ENV production
+      --set PASEO_NODE_ENV production
 
     # Create wrapper for the CLI
     makeWrapper ${nodejs}/bin/node $out/bin/paseo \