Revert "Merge pull request #20090 from sternenseemann/master"

Reason: https://github.com/NixOS/nixpkgs/pull/20090#commitcomment-19686426

This reverts commit 9ffcb1b250, reversing
changes made to a6283c1126.

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

@@ -1,39 +1,40 @@
-{ stdenv, buildOcaml, fetchurl, ocaml, findlib, ocamlbuild, opam, uucp, uutf, cmdliner }:
+{ stdenv, fetchurl, ocaml, findlib, ocamlbuild, opam, uucp, uutf, cmdliner }:
 
 let
+  inherit (stdenv.lib) getVersion versionAtLeast;
+
   pname = "uuseg";
+  version = "0.8.0";
   webpage = "http://erratique.ch/software/${pname}";
 in
 
-buildOcaml rec {
+assert versionAtLeast (getVersion ocaml) "4.01";
 
-  minimumSupportedOcamlVersion = "4.01";
+stdenv.mkDerivation {
 
-  name = pname;
-  version = "0.9.0";
+  name = "ocaml-${pname}-${version}";
 
   src = fetchurl {
     url = "${webpage}/releases/${pname}-${version}.tbz";
     sha256 = "00n4zi8dyw2yzi4nr2agcrr33b0q4dr9mgnkczipf4c0gm5cm50h";
   };
 
-  buildInputs = [ ocaml findlib ocamlbuild opam ];
-  propagatedBuildInputs = [ uucp uutf cmdliner ];
+  buildInputs = [ ocaml findlib ocamlbuild opam cmdliner ];
+  propagatedBuildInputs = [ uucp uutf ];
 
   createFindlibDestdir = true;
 
   unpackCmd = "tar xjf $src";
 
   buildPhase = ''
-    ocaml pkg/git.ml
     ocaml pkg/build.ml \
       native=true native-dynlink=true \
       uutf=true cmdliner=true
   '';
 
   installPhase = ''
-    opam-installer --prefix $out --script | sh
-    ln -s $out/lib/uuseg $out/lib/ocaml/${ocaml.version}/site-lib/
+    opam-installer --script --prefix=$out ${pname}.install | sh
+    ln -s $out/lib/${pname} $out/lib/ocaml/${getVersion ocaml}/site-lib/${pname}
   '';
 
   meta = with stdenv.lib; {