diff --git a/pkgs/development/libraries/libmodplug/default.nix b/pkgs/development/libraries/libmodplug/default.nix
index c4fa6fcd7ce..69c36dc718c 100644
--- a/pkgs/development/libraries/libmodplug/default.nix
+++ b/pkgs/development/libraries/libmodplug/default.nix
@@ -4,6 +4,13 @@ stdenv.mkDerivation rec {
   pname = "libmodplug";
   version = "0.8.9.0";
 
+  src = fetchurl {
+    url = "mirror://sourceforge/project/modplug-xmms/libmodplug/${version}/${pname}-${version}.tar.gz";
+    sha256 = "1pnri98a603xk47smnxr551svbmgbzcw018mq1k6srbrq6kaaz25";
+  };
+
+  outputs = [ "out" "dev" ];
+
   preConfigure = ''
      substituteInPlace configure \
         --replace ' -mmacosx-version-min=10.5' "" \
@@ -17,9 +24,4 @@ stdenv.mkDerivation rec {
     platforms   = platforms.unix;
     maintainers = with maintainers; [ raskin ];
   };
-
-  src = fetchurl {
-    url = "mirror://sourceforge/project/modplug-xmms/libmodplug/${version}/${pname}-${version}.tar.gz";
-    sha256 = "1pnri98a603xk47smnxr551svbmgbzcw018mq1k6srbrq6kaaz25";
-  };
 }