adding metadata to default.nix

Author: garbas

default.nix

@@ -63,4 +63,10 @@ in stdenv.mkDerivation rec {
     export PATH=$out/bin:$PATH
     export PYTHONPATH=`pwd`/src:$PYTHONPATH
   '';
+
+  meta = {
+    homepage = https://github.com/garbas/pypi2nix;
+    description = "A tool that generates nix expressions for your python packages, so you don't have to.";
+    maintainers = with stdenv.lib.maintainers; [ garbas ];
+  };
 }