Adding alsa/pulseaudio to mikmod

I also write the sf urls with mirror://.

pkgs/applications/audio/mikmod/default.nix

···
-{ stdenv, fetchurl, libmikmod, ncurses }:
+{ stdenv, fetchurl, libmikmod, ncurses, alsaLib }:
 
 stdenv.mkDerivation rec {
   name = "mikmod-3.2.6";
 
   src = fetchurl {
-    url = "http://downloads.sourceforge.net/project/mikmod/mikmod/3.2.6/mikmod-3.2.6.tar.gz";
+    url = "mirror://sourceforge/mikmod/${name}.tar.gz";
     sha256 = "0wr61raj10rpl64mk3x9g3rwys898fbzyg93c6mrz89nvc74wm04";
   };
 

pkgs/development/libraries/libmikmod/default.nix

···
-{ stdenv, fetchurl, texinfo }:
+{ stdenv, fetchurl, texinfo, alsaLib, pulseaudio }:
 
 stdenv.mkDerivation rec {
   name = "libmikmod-3.3.7";
-
   src = fetchurl {
-    url = "http://downloads.sourceforge.net/project/mikmod/libmikmod/3.3.7/libmikmod-3.3.7.tar.gz";
+    url = "mirror://sourceforge/mikmod/${name}.tar.gz";
     sha256 = "18nrkf5l50hfg0y50yxr7bvik9f002lhn8c00nbcp6dgm5011x2c";
   };
 
-  buildInputs = [ texinfo ];
+  buildInputs = [ texinfo ]
+    ++ stdenv.lib.optional stdenv.isLinux [ alsaLib pulseaudio ];
+  propagatedBuildInputs =
+    stdenv.lib.optional stdenv.isLinux pulseaudio;
+
+  NIX_LDFLAGS = stdenv.lib.optionalString stdenv.isLinux "-lasound";
 
   meta = with stdenv.lib; {
     description = "A library for playing tracker music module files";