diff --git a/src/libexpr/eval-settings.cc b/src/libexpr/eval-settings.cc index 85ec98816..8fbe94aef 100644 --- a/src/libexpr/eval-settings.cc +++ b/src/libexpr/eval-settings.cc @@ -85,12 +85,15 @@ bool EvalSettings::isPseudoUrl(std::string_view s) std::string EvalSettings::resolvePseudoUrl(std::string_view url) { if (hasPrefix(url, "channel:")) { + auto realUrl = "https://nixos.org/channels/" + std::string(url.substr(8)) + "/nixexprs.tar.xz"; static bool haveWarned = false; warnOnce(haveWarned, "Channels are deprecated in favor of flakes in Determinate Nix. " + "Instead of '%s', use '%s'. " "For a guide on Nix flakes, see: https://zero-to-nix.com/. " - "For details and to offer feedback on the deprecation process, see: https://github.com/DeterminateSystems/nix-src/issues/34."); - return "https://nixos.org/channels/" + std::string(url.substr(8)) + "/nixexprs.tar.xz"; + "For details and to offer feedback on the deprecation process, see: https://github.com/DeterminateSystems/nix-src/issues/34.", + url, realUrl); + return realUrl; } else return std::string(url); }