diff --git a/.github/workflows/release-signed.yml b/.github/workflows/release-signed.yml
index f26b1ec2..60c31da5 100644
--- a/.github/workflows/release-signed.yml
+++ b/.github/workflows/release-signed.yml
@@ -220,7 +220,9 @@ jobs:
 
   linux:
     needs: gate
-    runs-on: ubuntu-latest
+    # Pinned for the same 26.04 glibc header clash as build.yml's linux job
+    # (#929); see the comment there. The v1.7.0 release failed here (#1009).
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2