From ed49a4f4629b422358b2abdbeb3bcd49447fcbae Mon Sep 17 00:00:00 2001
From: Seth Axen <seth@sethaxen.com>
Date: Fri, 19 Jun 2026 11:46:01 +0200
Subject: [PATCH] ci: drop x64 arch pin from CI matrix

macos-latest now resolves to an arm64-only image, and pinning arch: x64 makes setup-julia fail there. arch never actually varied across this matrix, so just drop it and let setup-julia pick the right one per runner.

Co-authored-by: Claude <noreply@anthropic.com>
---
 .github/workflows/CI.yml | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 241b5f7d..8a5ecf10 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -14,7 +14,7 @@ concurrency:
   cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
 jobs:
   test:
-    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
+    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ github.event_name }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -25,21 +25,16 @@ jobs:
           - 'pre'
         os:
           - ubuntu-latest
-        arch:
-          - x64
         include:
           - version: '1'
             os: windows-latest
-            arch: x64
           - version: '1'
             os: macOS-latest
-            arch: x64
     steps:
       - uses: actions/checkout@v6
       - uses: julia-actions/setup-julia@v3
         with:
           version: ${{ matrix.version }}
-          arch: ${{ matrix.arch }}
       - uses: julia-actions/cache@v3
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1