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# Pinning Inputs with Mirrors | Nixtamal

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╹┗┛╹╱ ╹ ╹ ╹╹╹ ╹╹╹┗┛     Home      Install  Manpage  Changelog  Roadmap  Cookbook  Real-world showcase  Community  FAQs  Funding         Pinning Inputs with Mirrors    Mirrors are a very good idea for project to have.    Increases project resiliance as all servers go down so ideally something should be online to fallback to    Helps accessibility as some regions block users based on sanctions & others might not agree to the terms of service or privacy laws in the jurisdiction of some options    If self-hosted, then you/your project owns the code — which can help with potential censorship    At the time of writing, Nix flakes does not & cannot support mirrors in input pinning requiring an input pinner like Nixtamal to automate it.   How to pin a repository with mirrors in Nix + Nixtamal  Mirrors are not supported on all kinds (fetcher limitations) however these can be supported:    File    Archive    Darcs    Pijul    Git (only in eval time fetching using builtins.fetchGit )    Let’s show the way using the Soupault repository, but if it’s one of the supported kinds, any will work.  Latest revision  // manifest.kdl inputs  {  soupault  {  archive  {  url  "https://codeberg.org/PataphysicalSociety/soupault/archive/{{fresh-value}}.tar.gz"  mirrors  "https://github.com/PataphysicalSociety/soupault/archive/{{fresh-value}}.tar.gz"   }   }  fresh-cmd  {  $  git  ls-remote  --branches  main  "https://codeberg.org/PataphysicalSociety/soupault.git"  |  cut  -f1   }  }       Site made with Nix ( dep management), Nickel ( config ), Soupault ( SSG ), Docutils ( rST rendering), mandoc (manpage conversion), & sugilite256 (color scheme).  © 2025–2026 toastal .

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