233b61d3d6
The goal is to allow the installation and testing of arbitrary Nix versions. Extend the base installer to accept a `--tarball-url-prefix <url>` to change where the Nix tarball is getting downloaded from. Once this is merged it should allow to: 1. Pick an evaluation at https://hydra.nixos.org/jobset/nix/master that looks healthy 2. Select the installedScript build and find the store path. Now equipped with all of this, use an instance of nar-serve to fetch the install script and release tarballs: curl -sfL https://nar-serve.numtide.com/nix/store/rkv4yh7pym941bhj0849zqdkg2546bdv-installer-script/install \ | sh --tarball-url-prefix https://nar-serve.numtide.com/nix/store Or with cachix, strip the /nix/store and derivation name and then: curl -sfL https://mycache.cachix.org/serve/rkv4yh7pym941bhj0849zqdkg2546bdv/install \ | sh --tarball-url-prefix https://mycache.cachix.org/serve Fixes #4047