---
id: "bug-1509"
status: "fixed"
status_updated: "2026-09-24"
status_note: ""
component: "build"
severity: "unknown"
timestamp: "2026-08-10T07:34:55.093767+00:00"
last_seen: "2026-09-19T09:00:00Z"
occurrences: 1
files: ["src/flake.nix", "src/nixSupport/xce.nix", "src/autoscaler/scaler/include/scaler.h"]
tags: ["tech-debt", "build", "nix", "low-risk"]
related: []
legacy: true
---

# bug-1509: extralib flake dependency pulls external repo for trivial linked-list code used only by autoscaler…

## Description
extralib flake dependency pulls external repo for trivial linked-list code used only by autoscaler scaler.h

## Environment
_Not recorded (migrated from buglog.json)._

## Reproduction
_Not recorded (migrated from buglog.json)._

## Root cause
basiclib/list.h (xcelist_t + list_insert_entry_back) is the only consumer; can be vendored locally in ~30 lines.

## Fix
Port xcelist_t/xcelist_entry_t/list_insert_entry_back to local basic_list.h in autoscaler, remove extralib from flake.nix inputs and xce.nix nativeBuildInputs. ~40 min effort.

## Verification
_Not recorded (migrated from buglog.json)._

## References
_Not recorded (migrated from buglog.json)._