Option to get ref that built caches in cache.nixos.org instead of just a head

[kachick]

Because of non caching ref takes too long to build. It's not for my pleasure 🙄.

• https://discourse.nixos.org/t/check-if-package-is-available-in-cache/13831
• https://docs.cachix.org/faq#why-is-nix-not-picking-up-on-any-of-the-pre-built-artifacts
• https://discourse.nixos.org/t/new-tool-for-exploring-nar-contents-online/21840/5
• https://github.com/wh0/nix-cache-view
• https://discourse.nixos.org/t/what-should-i-expect-to-find-in-cache-nixos-org/7935/5
• https://github.com/cachix/install-nix-action/blob/6ed004b9ccb68dbc28e7c85bee15fa93dbd214ac/install-nix.sh#L89-L91

https://nixos.wiki/wiki/Binary_Cache

How to check if content is on a binary cache
We can use curl to check if a binary cache contains a given derivation. curl https://cache/store_hash.narinfo

[kachick]

https://releases.nixos.org/ => https://releases.nixos.org/?prefix=nixpkgs/ => https://releases.nixos.org/nixpkgs/nixpkgs-23.11pre509044.3acb5c4264c4 => https://releases.nixos.org/nixpkgs/nixpkgs-23.11pre509044.3acb5c4264c4/nixexprs.tar.xz is the answer? 👀

nix-community/nixbox#61 👀

[kachick]

https://discourse.nixos.org/t/best-way-to-pin-a-package-to-a-certain-revision-within-nixpkgs-flakes/17928/2 😮

I tried it, get the github commit ref as rev 2 days before...

[kachick]

https://nixos.wiki/wiki/Nix_channels
https://discourse.nixos.org/t/differences-between-nix-channels/13998

nixos-unstable is a bit old, but nixpkgs-unstable looks the one I actually want...

And using them with flake.nix, the revision can be locked and tracked by the flake.lock

😂

https://nixos.org/manual/nix/stable/command-ref/new-cli/nix3-flake-update.html