Hello, > I applied this one and updated the Guix package revision. Let's see if > it brings some improvements. Sadly, there are still some failures: --8<---------------cut here---------------start------------->8--- 2021/10/08 00:32:38 [error] 129925#0: *22076376 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 141.80.167.168, server: ci.guix.gnu.org, request: "GET /z6mk9m115h39cy8krryca7snimh9z5zq.narinfo HTTP/1.1", upstream: "http://127.0.0.1:3000/z6mk9m115h39cy8krryca7snimh9z5zq.narinfo", host: "141.80.167.131" 2021/10/08 00:32:38 [error] 129925#0: *22076361 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 141.80.167.164, server: ci.guix.gnu.org, request: "GET /2l4cxz4dlr39hr7s52i9khxbj89d83qz.narinfo HTTP/1.1", upstream: "http://127.0.0.1:3000/2l4cxz4dlr39hr7s52i9khxbj89d83qz.narinfo", host: "141.80.167.131" 2021/10/08 00:32:38 [error] 129925#0: *22076367 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 141.80.167.178, server: ci.guix.gnu.org, request: "GET /i4nwwda7mgk8n7qir59wmwppjjf216yz.narinfo HTTP/1.1", upstream: "http://127.0.0.1:3000/i4nwwda7mgk8n7qir59wmwppjjf216yz.narinfo", host: "141.80.167.131" --8<---------------cut here---------------end--------------->8--- I guess we need better profiling tools to understand what's going on here. Thanks, Mathieu