diff --git a/pkgs/tools/networking/carddav-util/default.nix b/pkgs/tools/networking/carddav-util/default.nix
index 86a13ba90e6..7cc89bebf47 100644
--- a/pkgs/tools/networking/carddav-util/default.nix
+++ b/pkgs/tools/networking/carddav-util/default.nix
@@ -31,9 +31,10 @@ stdenv.mkDerivation rec {
       --prefix PATH : "$prefix/bin:$PATH"
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = https://github.com/ljanyst/carddav-util;
     description = "A CardDAV import/export utility";
-    platforms = stdenv.lib.platforms.unix;
+    platforms = platforms.unix;
+    license = licenses.isc;
   };
 }