diff --git a/pkgs/lib/default.nix b/pkgs/lib/default.nix index cac34c26719..720ffcf9b37 100644 --- a/pkgs/lib/default.nix +++ b/pkgs/lib/default.nix @@ -117,5 +117,12 @@ rec { # (e.g. `++ optional (system == "i686-linux") flashplayer'). optional = cond: elem: if cond then [elem] else []; - + + # Return a list of integers from `first' up to and including `last'. + range = first: last: + if builtins.lessThan last first + then [] + else [first] ++ range (builtins.add first 1) last; + + }