nixpkgs/pkgs/applications/editors/emacs-modes/perl-completion/default.nix

{stdenv, fetchurl}:

stdenv.mkDerivation {
  name = "perl-completion";

  src = fetchurl {
    url = "http://emacswiki.org/emacs/download/perl-completion.el";
    sha256 = "0x6qsgs4hm87k0z9q3g4p6508kc3y123j5jayll3jf3lcl2vm6ks";
  };

  phases = [ "installPhase"];

  installPhase = ''
    install -d $out/share/emacs/site-lisp
    install $src $out/share/emacs/site-lisp/perl-completion.el
  '';

  meta = {
    description = "Minor mode provides useful features for editing perl codes";
    homepage = http://emacswiki.org/emacs/PerlCompletion;
    platforms = stdenv.lib.platforms.all;
  };
}