@@ -10,11 +10,15 @@ Nixpkgs. Users should probably pin a suitable version of nixpkgs
1010although, although things might not work for them if their Nixpkgs version is
1111too different.
1212
13−We aim to keep this pin somewhere on the channel of the **NixOS latest
14−stable release**. That is currently 19.03. So:
13+We aim to keep this pin somewhere on a channel of the **Nixpkgs latest
14+stable release**. That is currently 19.09.
15+
16+We also execute tests on MacOS (darwin). The darwin channel is usually
17+behind the NixOS channel. So we choose the `nixpkgs-19.09-darwin`
18+channel:
1519
1620```
17−nix-prefetch-git https://github.com/NixOS/nixpkgs-channels refs/heads/nixos-19.03
21+nix-prefetch-git https://github.com/NixOS/nixpkgs-channels refs/heads/nixpkgs-19.09-darwin
1822```
1923
2024Keep the URL in `github.json` pointing at