diff --git a/build/toolchain/toolchain-bundle/pkgs/bison/default.nix b/build/toolchain/toolchain-bundle/pkgs/bison/default.nix
new file mode 100644
index 0000000..9132a30
--- /dev/null
+++ b/build/toolchain/toolchain-bundle/pkgs/bison/default.nix
@@ -0,0 +1,9 @@
+{ super, ... }:
+super.bison.overrideAttrs (_: {
+  # Check overrided file for more informations
+  postPatch = ''
+    cp ${./yacc.in} src/yacc.in
+  '';
+
+  env.BISON = "${builtins.placeholder "out"}/bin/bison";
+})