diff --git a/pkgs/development/ocaml-modules/async_kernel/default.nix b/pkgs/development/ocaml-modules/async_kernel/default.nix
deleted file mode 100644
index 19b4d6213e49..000000000000
--- a/pkgs/development/ocaml-modules/async_kernel/default.nix
+++ /dev/null
@@ -1,25 +0,0 @@
-{stdenv, buildOcaml, fetchurl, core_kernel_p4,
- bin_prot_p4, fieldslib_p4, pa_ounit, pa_test,
- sexplib_p4, herelib}:
-
-buildOcaml rec {
-  name = "async_kernel";
-  version = "112.24.00";
-
-  minimumSupportedOcamlVersion = "4.02";
-
-  src = fetchurl {
-    url = "https://github.com/janestreet/async_kernel/archive/${version}.tar.gz";
-    sha256 = "95caf4249b55c5a6b38da56e314845e9ea9a0876eedd4cf0ddcb6c8dd660c6a0";
-  };
-
-  buildInputs = [ pa_test pa_ounit ];
-  propagatedBuildInputs = [ core_kernel_p4 bin_prot_p4 fieldslib_p4 herelib sexplib_p4 ];
-
-  meta = with stdenv.lib; {
-    homepage = "https://github.com/janestreet/async_kernel";
-    description = "Jane Street Capital's asynchronous execution library (core) ";
-    license = licenses.asl20;
-    maintainers = [ maintainers.ericbmerritt ];
-  };
-}
diff --git a/pkgs/development/ocaml-modules/janestreet/async-kernel.nix b/pkgs/development/ocaml-modules/janestreet/async-kernel.nix
deleted file mode 100644
index 6e8a5cae6354..000000000000
--- a/pkgs/development/ocaml-modules/janestreet/async-kernel.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-{stdenv, buildOcamlJane, core_kernel,
- bin_prot, fieldslib,
- sexplib, herelib}:
-
-buildOcamlJane {
-  name = "async_kernel";
-  hash = "1n6ifbrq6q6hq8bxh6b9vhg11mv9r6jgp1b7vfw7mh5s2nrd4b60";
-  propagatedBuildInputs = [ core_kernel bin_prot fieldslib herelib sexplib ];
-
-  meta = with stdenv.lib; {
-    homepage = "https://github.com/janestreet/async_kernel";
-    description = "Jane Street Capital's asynchronous execution library (core) ";
-    license = licenses.asl20;
-    maintainers = [ maintainers.maurer maintainers.ericbmerritt ];
-  };
-}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 010e46bf5490..5463c2d0f954 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -38,8 +38,6 @@ let
 
     astring = callPackage ../development/ocaml-modules/astring { };
 
-    async_kernel_p4 = callPackage ../development/ocaml-modules/async_kernel { };
-
     atd = callPackage ../development/ocaml-modules/atd { };
 
     atdgen = callPackage ../development/ocaml-modules/atdgen { };
@@ -1178,13 +1176,6 @@ let
       then callPackage ../development/ocaml-modules/janestreet/core.nix {}
       else core_p4;
 
-    async_kernel =
-      if lib.versionOlder "4.03" ocaml.version
-      then janeStreet.async_kernel
-      else if lib.versionOlder "4.02" ocaml.version
-      then callPackage ../development/ocaml-modules/janestreet/async-kernel.nix {}
-      else async_kernel_p4;
-
     async_rpc_kernel =
       if lib.versionOlder "4.03" ocaml.version
       then janeStreet.async_rpc_kernel