diff --git a/pkgs/development/tools/parsing/ragel/default.nix b/pkgs/development/tools/parsing/ragel/default.nix
index 24b47119dc61..f359ed9c1684 100644
--- a/pkgs/development/tools/parsing/ragel/default.nix
+++ b/pkgs/development/tools/parsing/ragel/default.nix
@@ -25,6 +25,8 @@ let
 
       doCheck = true;
 
+      enableParallelBuilding = true;
+
       meta = with lib; {
         homepage = "https://www.colm.net/open-source/ragel/";
         description = "State machine compiler";