Don't use buildOcaml

pkgs/build-support/ocaml/oasis.nix

@@ -1,10 +1,24 @@
-{ buildOcaml, ocaml_oasis }:
+{ stdenv, ocaml_oasis, ocaml, findlib, ocamlbuild, camlp4 }:
 
-{ buildInputs ? [], ...
+{ name, version, buildInputs ? [], meta ? { platforms = ocaml.meta.platforms or []; },
+  minimumOcamlVersion ? null,
+  createFindlibDestdir ? true,
+  dontStrip ? true,
+  hasSharedObjects ? false,
+  setupHook ? null,
+  ...
 }@args:
 
-buildOcaml (args // {
+ assert minimumOcamlVersion != null ->
-  buildInputs = [ ocaml_oasis ] ++ buildInputs;
+          stdenv.lib.versionOlder minimumOcamlVersion ocaml.version;
+
+stdenv.mkDerivation (args // {
+  name = "ocaml-${name}-${version}";
+
+  buildInputs = [ ocaml findlib ocamlbuild camlp4 ocaml_oasis ] ++ buildInputs;
+
+  inherit createFindlibDestdir;
+  inherit dontStrip;
 
   buildPhase = ''
     runHook preBuild
@@ -28,4 +42,11 @@ buildOcaml (args // {
     prefix=$OCAMLFIND_DESTDIR ocaml setup.ml -install
     runHook postInstall
   '';
+
+  setupHook = if setupHook == null && hasSharedObjects
+              then stdenv.writeText "setupHook.sh" ''
+              export CAML_LD_LIBRARY_PATH="''${CAML_LD_LIBRARY_PATH}''${CAML_LD_LIBRARY_PATH:+:}''$1/lib/ocaml/${ocaml.version}/site-lib/${name}/"
+              ''
+              else setupHook;
+
 })

pkgs/development/ocaml-modules/tcslib/default.nix

@@ -4,7 +4,7 @@ buildOasisPackage rec {
   name = "tcslib";
   version = "0.3";
 
-  minimumSupportedOCamlVersion = "4.03.0";
+  minimumOCamlVersion = "4.03.0";
 
   src = fetchFromGitHub {
     owner  = "tcsprojects";

pkgs/top-level/ocaml-packages.nix

@@ -12,7 +12,7 @@ let
 
     buildOcaml = callPackage ../build-support/ocaml { };
 
-    buildOasisPackage = callPackage ../build-support/ocaml/oasis.nix { buildOcaml = buildOcaml; };
+    buildOasisPackage = callPackage ../build-support/ocaml/oasis.nix { };
 
     buildDunePackage = callPackage ../build-support/ocaml/dune.nix {};