1 files changed, 13 insertions, 7 deletions
diff --git a/nixpkgs/pkgs/development/libraries/stxxl/default.nix b/nixpkgs/pkgs/development/libraries/stxxl/default.nix
index eec4f722d411..391424ee2c93 100644
--- a/nixpkgs/pkgs/development/libraries/stxxl/default.nix
+++ b/nixpkgs/pkgs/development/libraries/stxxl/default.nix
@@ -1,5 +1,8 @@
-{ lib, stdenv, fetchurl, cmake
-, parallel ? true
+{ lib
+, stdenv
+, fetchFromGitHub
+, cmake
+, parallelSupport ? (!stdenv.isDarwin)
 }:
 
 let
@@ -10,9 +13,11 @@ stdenv.mkDerivation rec {
   pname = "stxxl";
   version = "1.4.1";
 
-  src = fetchurl {
-    url = "https://github.com/stxxl/stxxl/archive/${version}.tar.gz";
-    sha256 = "54006a5fccd1435abc2f3ec201997a4d7dacddb984d2717f62191798e5372f6c";
+  src = fetchFromGitHub {
+    owner = "stxxl";
+    repo = "stxxl";
+    rev = version;
+    sha256 = "sha256-U6DQ5mI83pyTmq5/ga5rI8v0h2/iEnNl8mxhIOpbF1I=";
   };
 
   nativeBuildInputs = [ cmake ];
@@ -20,11 +25,12 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DBUILD_SHARED_LIBS=ON"
     "-DBUILD_STATIC_LIBS=OFF"
-    (mkFlag parallel "USE_GNU_PARALLEL")
+    (mkFlag parallelSupport "USE_GNU_PARALLEL")
+    (mkFlag parallelSupport "USE_OPENMP")
   ];
 
   passthru = {
-    inherit parallel;
+    inherit parallelSupport;
   };
 
   meta = with lib; {