diff --git a/pkgs/tools/system/gdmap/default.nix b/pkgs/tools/system/gdmap/default.nix
index e9592b366661..3d3809610e4d 100644
--- a/pkgs/tools/system/gdmap/default.nix
+++ b/pkgs/tools/system/gdmap/default.nix
@@ -12,8 +12,11 @@ stdenv.mkDerivation rec {
 
   patches = [ ./get_sensitive.patch ./set_flags.patch ];
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://gdmap.sourceforge.net;
     description = "Recursive rectangle map of disk usage";
+    license = licenses.gpl2;
+    platforms = platforms.all;
+    maintainers = [ maintainers.bjornfor ];
   };
 }