diff --git a/pkgs/applications/science/electronics/alliance/default.nix b/pkgs/applications/science/electronics/alliance/default.nix
index 909a3ec767c6..cf135b9469a7 100644
--- a/pkgs/applications/science/electronics/alliance/default.nix
+++ b/pkgs/applications/science/electronics/alliance/default.nix
@@ -19,6 +19,10 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ libtool automake autoconf flex ];
   buildInputs = [ xorgproto motif libX11 libXt libXpm bison ];
 
+  # Disable parallel build, errors:
+  #  ./pat_decl_y.y:736:5: error: expected '=', ...
+  enableParallelBuilding = false;
+
   ALLIANCE_TOP = placeholder "out";
 
   configureFlags = [