ocamlPackages.xmlm: set pname instead of name (#484539)

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

@@ -7,16 +7,13 @@
   ocamlbuild,
   topkg,
 }:
-let
+stdenv.mkDerivation (finalAttrs: {
+  name = "ocaml${ocaml.version}-${finalAttrs.pname}-${finalAttrs.version}";
   pname = "xmlm";
-  webpage = "https://erratique.ch/software/${pname}";
-in
-stdenv.mkDerivation rec {
-  name = "ocaml${ocaml.version}-${pname}-${version}";
   version = "1.4.0";
 
   src = fetchurl {
-    url = "${webpage}/releases/${pname}-${version}.tbz";
+    url = "https://erratique.ch/software/xmlm/releases/xmlm-${finalAttrs.version}.tbz";
     sha256 = "sha256-CRJSJY490WMgw85N2yG81X79nIwuv7eZ7mpUPtSS2fo=";
   };
 
@@ -34,11 +31,10 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "OCaml streaming codec to decode and encode the XML data format";
-    homepage = webpage;
+    homepage = "https://erratique.ch/software/xmlm";
     license = lib.licenses.isc;
     maintainers = [ lib.maintainers.vbgl ];
     mainProgram = "xmltrip";
     inherit (ocaml.meta) platforms;
-    broken = lib.versionOlder ocaml.version "4.05";
   };
-}
+})