diff --git a/pkgs/development/ocaml-modules/sexplib/108.08.00.nix b/pkgs/development/ocaml-modules/sexplib/108.08.00.nix
index e97a03d43af..3e73b562e7e 100644
--- a/pkgs/development/ocaml-modules/sexplib/108.08.00.nix
+++ b/pkgs/development/ocaml-modules/sexplib/108.08.00.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = https://ocaml.janestreet.com/;
     description = "Library for serializing OCaml values to and from S-expressions";
-    license = stdenv.lib.asl20;
+    license = stdenv.lib.licenses.asl20;
     platforms = ocaml.meta.platforms;
   };
 }
diff --git a/pkgs/development/ocaml-modules/sexplib/default.nix b/pkgs/development/ocaml-modules/sexplib/default.nix
index 613c635675f..6f744778875 100644
--- a/pkgs/development/ocaml-modules/sexplib/default.nix
+++ b/pkgs/development/ocaml-modules/sexplib/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
   meta = {
     homepage = https://ocaml.janestreet.com/;
     description = "Library for serializing OCaml values to and from S-expressions";
-    license = stdenv.lib.asl20;
+    license = stdenv.lib.licenses.asl20;
     platforms = ocaml.meta.platforms;
   };
 }
diff --git a/pkgs/development/ocaml-modules/typeconv/108.08.00.nix b/pkgs/development/ocaml-modules/typeconv/108.08.00.nix
index 751d3da9809..30ced37efe5 100644
--- a/pkgs/development/ocaml-modules/typeconv/108.08.00.nix
+++ b/pkgs/development/ocaml-modules/typeconv/108.08.00.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation {
   meta = with stdenv.lib; {
     homepage = https://ocaml.janestreet.com/;
     description = "Support library for OCaml preprocessor type conversions";
-    license = licenses.apl20;
+    #license = licenses.apl20; invalid license
     platforms = ocaml.meta.platforms;
     maintainers = with maintainers; [ z77z ];
   };