# Artifact hash mismatch when installing libpng (Julia 1.6.1)

**URL:** <https://discourse.julialang.org/t/artifact-hash-mismatch-when-installing-libpng-julia-1-6-1/61766>\
**Category:** General Usage\
**Tags:** update\
**Created:** [May 25, 2021, 8:54am UTC](https://discourse.julialang.org/t/artifact-hash-mismatch-when-installing-libpng-julia-1-6-1/61766 "2021-05-25T08:54:39Z")\
**Posts on this page:** 1\
**Showing post:** 26

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**Author:** ![StefanKarpinski](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stefankarpinski/32/24_2.png) [@StefanKarpinski](https://discourse.julialang.org/u/StefanKarpinski)\
**Post date:** [May 25, 2021, 3:02pm UTC](https://discourse.julialang.org/t/artifact-hash-mismatch-when-installing-libpng-julia-1-6-1/61766/26 "2021-05-25T15:02:33Z")

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I might add that if you use JuliaHub’s package servers ([pkg.juliahub.com](http://pkg.juliahub.com)), they don’t advertise registry updates until they’ve processed all the artifacts, which means there’s a lag between when something appears in the registry and when you’ll be able to install it, which is why we don’t do this for the open source pkg servers. That might be a better choice of package server if you are behind a firewall that blocks access to GitHub. You will need to log into JuliaHub and get an auth token because the server is authenticated.

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_[View the full topic](https://discourse.julialang.org/t/artifact-hash-mismatch-when-installing-libpng-julia-1-6-1/61766)._