From 8d94c496e9f9e0dd95c1f209e3c4cffdbcf7250b Mon Sep 17 00:00:00 2001
From: Matt Sturgeon <matt@sturgeon.me.uk>
Date: Tue, 7 Jul 2026 09:16:11 +0100
Subject: [PATCH] ci/treefmt: add `gitMinimal` for `treefmt`

treefmt needs git on the PATH for its default `tree-root` calculation,
`git rev-parse --show-toplevel`
---
 ci/treefmt.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ci/treefmt.nix b/ci/treefmt.nix
index 29419056dd77..a0d4ffbc1ef2 100644
--- a/ci/treefmt.nix
+++ b/ci/treefmt.nix
@@ -4,6 +4,11 @@
   ...
 }:
 {
+  runtimeInputs = [
+    # tree-root uses `git rev-parse --show-toplevel`
+    pkgs.gitMinimal
+  ];
+
   settings = {
     # numtide/treefmt-nix defaults
     excludes = [