diff --git a/pkgs/development/ocaml-modules/core/default.nix b/pkgs/development/ocaml-modules/core/default.nix
deleted file mode 100644
index a808975d250e..000000000000
--- a/pkgs/development/ocaml-modules/core/default.nix
+++ /dev/null
@@ -1,30 +0,0 @@
-{stdenv, buildOcaml, fetchurl, type_conv,
- core_kernel_p4, bin_prot_p4, comparelib, custom_printf, enumerate,
- fieldslib_p4, herelib, pa_bench, pa_test, pa_ounit,
- pipebang, sexplib_p4, typerep_p4, variantslib_p4}:
-
-buildOcaml rec {
-  name = "core";
-  version = "112.24.01";
-
-  minimumSupportedOcamlVersion = "4.02";
-
-  src = fetchurl {
-    url = "https://github.com/janestreet/core/archive/${version}.tar.gz";
-    sha256 = "be5d53ebd4fd04ef23ebf9b3b2840c7aeced6bc4cc6cd3f5e89f71c9949000f4";
-  };
-
-  hasSharedObjects = true;
-
-  buildInputs = [ pa_bench pa_test pa_ounit ];
-  propagatedBuildInputs = [ type_conv core_kernel_p4 bin_prot_p4 comparelib
-                            custom_printf enumerate fieldslib_p4 herelib
-                            pipebang sexplib_p4 typerep_p4 variantslib_p4 ];
-
-  meta = with stdenv.lib; {
-    homepage = "https://github.com/janestreet/core";
-    description = "Jane Street Capital's standard library overlay";
-    license = licenses.asl20;
-    maintainers = [ maintainers.ericbmerritt ];
-  };
-}
diff --git a/pkgs/development/ocaml-modules/janestreet/core.nix b/pkgs/development/ocaml-modules/janestreet/core.nix
deleted file mode 100644
index ac62bc51b070..000000000000
--- a/pkgs/development/ocaml-modules/janestreet/core.nix
+++ /dev/null
@@ -1,19 +0,0 @@
-{stdenv, buildOcamlJane,
- core_kernel,
- bin_prot, fieldslib, sexplib, typerep, variantslib,
- ppx_assert, ppx_bench, ppx_driver, ppx_expect, ppx_inline_test, ppx_jane}:
-
-buildOcamlJane {
-  name = "core";
-  hash = "0nz6d5glgymbpchvcpw77yis9jgi2bll32knzy9vx99wn83zdrmd";
-  propagatedBuildInputs =
-    [ core_kernel bin_prot fieldslib sexplib typerep variantslib
-      ppx_assert ppx_bench ppx_driver ppx_expect ppx_inline_test ppx_jane ];
-
-  meta = with stdenv.lib; {
-    homepage = "https://github.com/janestreet/core";
-    description = "Jane Street Capital's standard library overlay";
-    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 7db3335f6a1a..821166fca92f 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -591,8 +591,6 @@ let
 
     core_kernel_p4 = callPackage ../development/ocaml-modules/core_kernel { };
 
-    core_p4 = callPackage ../development/ocaml-modules/core { };
-
     ocamlbuild =
     if lib.versionOlder "4.03" ocaml.version then
     callPackage ../development/tools/ocaml/ocamlbuild { }
@@ -1169,13 +1167,6 @@ let
       then callPackage ../development/ocaml-modules/janestreet/core_kernel.nix {}
       else core_kernel_p4;
 
-    core =
-      if lib.versionOlder "4.03" ocaml.version
-      then janeStreet.core
-      else if lib.versionOlder "4.02" ocaml.version
-      then callPackage ../development/ocaml-modules/janestreet/core.nix {}
-      else core_p4;
-
     async_rpc_kernel =
       if lib.versionOlder "4.03" ocaml.version
       then janeStreet.async_rpc_kernel