NIXPKG1 http://nix.cs.uu.nl/dist/nix/nixpkgs-0.11/MANIFEST keen4 i686-linux /nix/store/azy01l4cqnnfa4hmnzz4inw132rrf5pb-keen4.drv /nix/store/mlqngsafmwivlr3ix9n98ihhc4q5al51-keen4