Turn more licenses into lib.licenses style

Should eval cleanly, as far as -A tarball tells me.

Relevant: issue #2999, issue #739

1 files changed, 1 insertions, 1 deletions

diff --git a/pkgs/games/dwarf-fortress/df2014.nix b/pkgs/games/dwarf-fortress/df2014.nix
index 64a3e5bc9755..406c45d3414b 100644
--- a/pkgs/games/dwarf-fortress/df2014.nix
+++ b/pkgs/games/dwarf-fortress/df2014.nix
@@ -104,7 +104,7 @@ stdenv.mkDerivation rec {
   meta = {
       description = "control a dwarven outpost or an adventurer in a randomly generated, persistent world";
       homepage = http://www.bay12games.com/dwarves;
-      license = "unfree-redistributable";
+      license = stdenv.lib.licenses.unfreeRedistributable;
       maintainers = [stdenv.lib.maintainers.roconnor];
   };
 }