diff --git a/lib/options.nix b/lib/options.nix index a16a980398d..d2eae3ae3a9 100644 --- a/lib/options.nix +++ b/lib/options.nix @@ -101,7 +101,7 @@ rec { mergeOneOption = loc: defs: if defs == [] then abort "This case should never happen." else if length defs != 1 then - throw "The unique option `${showOption loc}' is defined multiple times, in ${showFiles (getFiles defs)}." + throw "The unique option `${showOption loc}' is defined multiple times, in:\n - ${concatStringsSep "\n - " (getFiles defs)}." else (head defs).value; /* "Merge" option definitions by checking that they all have the same value. */