diff --git a/pkgs/by-name/xm/xml-security-c/package.nix b/pkgs/by-name/xm/xml-security-c/package.nix
index 0bc9e62a34fe..7af6a42ab084 100644
--- a/pkgs/by-name/xm/xml-security-c/package.nix
+++ b/pkgs/by-name/xm/xml-security-c/package.nix
@@ -21,6 +21,8 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-D60JtD4p9ERh6sowvwBHtE9XWVm3D8saooagDvA6ZtQ=";
   };
 
+  enableParallelBuilding = true;
+
   configureFlags = [
     "--with-openssl"
     "--with-xerces"