---
id: "bug-1458"
status: "fixed"
status_updated: "2026-09-24"
status_note: ""
component: "build"
severity: "unknown"
timestamp: "2026-07-22T03:22:00Z"
last_seen: "2026-09-19T09:00:00Z"
occurrences: 1
files: ["src/nixSupport/xce.nix"]
tags: ["nix", "xceadmin", "python", "pip", "xce-build", "admin-config-tool", "task-1.3"]
related: []
legacy: true
---

# bug-1458: tools/xce-build.sh: line 134: pip: command not found (inside nix develop ./src, running the new…

## Description
tools/xce-build.sh: line 134: pip: command not found (inside nix develop ./src, running the new `xceadmin` build case, exit 127)

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

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

## Root cause
admin-config-tool task 1.3 added python3Packages.{pycapnp,pyyaml,jsonschema,click,pytest,ruff} to xce.nix nativeBuildInputs per brief.md's Nix Environment section, but that list (copied verbatim from brief.md) omits python3Packages.pip. None of those packages transitively pull in a `pip` executable on PATH in a nix devShell built this way, so `pip install -e .` in the new xce-build.sh `xceadmin)` case failed immediately with command-not-found the first time it was actually exercised end-to-end inside `nix develop ./src`.

## Fix
Added python3Packages.pip to xce.nix nativeBuildInputs alongside the other python3Packages.* additions. Verified via `nix develop ./src --command bash -c 'which pip; pip --version'`.

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

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