diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index eb00bb33b33..aa1719c338b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -11669,7 +11669,7 @@ in
   libb2 = callPackage ../development/libraries/libb2 { };
 
   libbap = callPackage ../development/libraries/libbap {
-    inherit (ocamlPackages) bap ocaml findlib ctypes;
+    inherit (ocaml-ng.ocamlPackages_4_06) bap ocaml findlib ctypes;
   };
 
   libbass = (callPackage ../development/libraries/audio/libbass { }).bass;
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 670a7179bad..7f0a597d22b 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -418,7 +418,7 @@ in {
   backports-shutil-which = callPackage ../development/python-modules/backports-shutil-which {};
 
   bap = callPackage ../development/python-modules/bap {
-    bap = pkgs.ocamlPackages.bap;
+    bap = pkgs.ocaml-ng.ocamlPackages_4_06.bap;
   };
 
   baselines = callPackage ../development/python-modules/baselines { };