diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7fc37fc8790..effaf77680c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3320,7 +3320,7 @@ let
   }));
 
   bison2 = callPackage ../development/tools/parsing/bison/2.x.nix { };
-  bison3 = callPackage ../development/tools/parsing/bison/3.x.nix { };
+  bison3 = lowPrio (callPackage ../development/tools/parsing/bison/3.x.nix { });
   bison = bison2;
 
   buildbot = callPackage ../development/tools/build-managers/buildbot {