From 52c37b1fd5df0af7adf4eda335af73ebe6fd3f8c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christopher=20M=C3=BChl?= <toki@toph.so>
Date: Wed, 18 Feb 2026 21:10:17 +0100
Subject: [PATCH] fix(push-nix-cache): avoid nix S3 backend aws-chunked issue
 via file cache + aws s3 sync

---
 push-nix-cache/action.yaml | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/push-nix-cache/action.yaml b/push-nix-cache/action.yaml
index bd9edac..bc79e91 100644
--- a/push-nix-cache/action.yaml
+++ b/push-nix-cache/action.yaml
@@ -26,7 +26,8 @@ runs:
       run: |
         echo "${NIX_SIGNING_KEY}" > /tmp/nix-key
         nix store sign -k /tmp/nix-key --recursive "${{ inputs.store-path }}"
-        nix copy \
-          --to "s3://${{ inputs.s3-bucket }}?endpoint=${{ inputs.s3-endpoint }}" \
-          "${{ inputs.store-path }}"
         rm /tmp/nix-key
+        nix copy --to "file:///tmp/nix-cache" "${{ inputs.store-path }}"
+        aws s3 sync /tmp/nix-cache \
+          "s3://${{ inputs.s3-bucket }}" \
+          --endpoint-url "${{ inputs.s3-endpoint }}"