hydra-pin is a tool to query Nix's Hydra CI for the last successful build of a package and generate an overlay pinning only that package to that version.
Usage: hydra-pin [OPTIONS] --package <PACKAGE> --nix <NIX> <COMMAND>
Commands:
pin
unpin
help Print this message or the help of the given subcommand(s)
Options:
-b, --hydra-check <HYDRA_CHECK> hydra-check binary to use [env: HYDRA_CHECK=]
-p, --package <PACKAGE> Packag
-n, --nix <NIX> Nix file to store generated overlay in
-h, --help Print help
hydra-pin -n /etc/nixos/generated/pinned.nix -p sage pin will generate a Nix file like so:
# sage https://github.com/NixOS/nixpkgs/archive/63c3a29ca82437c87573e4c6919b09a24ea61b0f.tar.gz 0inlj292qm3k4sqibm60gpdh3kq57vvl3mjh2xpr9svjpfcz5hz1
{pkgs}: {
overlay = (final: prev: {
sage = (import (fetchTarball {
url = "https://github.com/NixOS/nixpkgs/archive/63c3a29ca82437c87573e4c6919b09a24ea61b0f.tar.gz";
sha256 = "0inlj292qm3k4sqibm60gpdh3kq57vvl3mjh2xpr9svjpfcz5hz1";
}) { system = pkgs.system; }).sage;
});
}which can be imported as an overlay, transparently replacing the broken version in nixpkgs-unstable.
{ pkgs}:
{
config = {
nixpkgs.overlays =
[
((import ../generated/pinned.nix) { inherit pkgs; }).overlay
];
};
}