diff --git a/pkgs/development/compilers/llvm/7/llvm.nix b/pkgs/development/compilers/llvm/7/llvm.nix
index 55485418e4f1..0a85d862f206 100644
--- a/pkgs/development/compilers/llvm/7/llvm.nix
+++ b/pkgs/development/compilers/llvm/7/llvm.nix
@@ -168,6 +168,7 @@ in stdenv.mkDerivation ({
 
   enableParallelBuilding = true;
 
+  requiredSystemFeatures = [ "big-parallel" ];
   meta = {
     description = "Collection of modular and reusable compiler and toolchain technologies";
     homepage    = "https://llvm.org/";