nix-prefetch-*: fix binary name (#488336)

      dontUnpack = true;

      installPhase = ''

        install -vD ${src} $out/bin/$name;

        wrapProgram $out/bin/$name \

        install -vD ${src} $out/bin/$pname;

        wrapProgram $out/bin/$pname \

          --prefix PATH : ${lib.makeBinPath (deps ++ [ coreutils ])} \

          --set HOME /homeless-shelter

      '';