substitute: 
substitute: updating substitutes from 'http://141.80.167.131:5557'...   0.0%
substitute: updating substitutes from 'http://141.80.167.131:5557'... 100.0%
fetching path `/gnu/store/wq5mxbfzjqh5xbbgmshm5gvf2k7fvg4x-ruby-http-cookie-1.0.3'...
@ substituter-started /gnu/store/wq5mxbfzjqh5xbbgmshm5gvf2k7fvg4x-ruby-http-cookie-1.0.3 substitute
Downloading http://141.80.167.131:5557/nar/gzip/wq5mxbfzjqh5xbbgmshm5gvf2k7fvg4x-ruby-http-cookie-1.0.3...

 ruby-http-cookie-1.0.3                      354KiB/s 00:00 | 16KiB transferred
 ruby-http-cookie-1.0.3                      1.2MiB/s 00:00 | 57KiB transferred

@ substituter-succeeded /gnu/store/wq5mxbfzjqh5xbbgmshm5gvf2k7fvg4x-ruby-http-cookie-1.0.3