diff --git a/pkgs/development/libraries/stxxl/default.nix b/pkgs/development/libraries/stxxl/default.nix
index 5cc0e6037a23..391424ee2c93 100644
--- a/pkgs/development/libraries/stxxl/default.nix
+++ b/pkgs/development/libraries/stxxl/default.nix
@@ -2,7 +2,7 @@
 , stdenv
 , fetchFromGitHub
 , cmake
-, parallel ? true
+, parallelSupport ? (!stdenv.isDarwin)
 }:
 
 let
@@ -25,11 +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; {
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 988e1154429d..1c4575d5ac31 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19677,7 +19677,7 @@ with pkgs;
 
   StormLib = callPackage ../development/libraries/StormLib { };
 
-  stxxl = callPackage ../development/libraries/stxxl { parallel = true; };
+  stxxl = callPackage ../development/libraries/stxxl { };
 
   sqlite = lowPrio (callPackage ../development/libraries/sqlite { });