meta.license should be a (list of) string(s), not an attribute set

http://hydra.nixos.org/build/4744513

pkgs/development/interpreters/php/5.3.nix

@@ -43,7 +43,7 @@ composableDerivation.composableDerivation {} ( fixed : let inherit (fixed.fixed)
       libxml2 = {
         configureFlags = [
           "--with-libxml-dir=${libxml2}"
-          "--with-iconv-dir=${libiconv}"
+          #"--with-iconv-dir=${libiconv}"
           ];
         buildInputs = [ libxml2 ];
       };

pkgs/lib/licenses.nix

@@ -183,15 +183,9 @@
     url = http://www.tcl.tk/software/tcltk/license.html;
   };
 
-  unfree = {
-    shortName = "unfree";
-    fullName = "unfree non-redistributable license";
-  };
+  unfree = "unfree";
 
-  unfreeRedistributable = {
-    shortName = "unfree-redistributable";
-    fullName = "unfree redistributable license";
-  };
+  unfreeRedistributable = "unfree-redistributable";
 
   zlib = {
     shortName = "zlib";