diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 19cbe826b9f..3ffeecb2d40 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -30211,7 +30211,9 @@ in
 
   herwig = callPackage ../development/libraries/physics/herwig { };
 
-  lhapdf = callPackage ../development/libraries/physics/lhapdf { };
+  lhapdf = callPackage ../development/libraries/physics/lhapdf {
+    python = python3;
+  };
 
   mela = callPackage ../development/libraries/physics/mela { };