diff --git a/pkgs/development/ocaml-modules/sedlex/default.nix b/pkgs/development/ocaml-modules/sedlex/default.nix
index 3a9f87bd93ab..c1ea56b5c506 100644
--- a/pkgs/development/ocaml-modules/sedlex/default.nix
+++ b/pkgs/development/ocaml-modules/sedlex/default.nix
@@ -1,16 +1,18 @@
-{ stdenv, lib, fetchzip, ocaml, findlib, gen, ppx_tools_versioned, ocaml-migrate-parsetree }:
+{ stdenv, lib, fetchFromGitHub, ocaml, findlib, gen, ppx_tools_versioned, ocaml-migrate-parsetree }:
 
 if !lib.versionAtLeast ocaml.version "4.02"
 then throw "sedlex is not available for OCaml ${ocaml.version}"
 else
 
 stdenv.mkDerivation rec {
-  name = "ocaml${ocaml.version}-sedlex-${version}";
+  pname = "ocaml${ocaml.version}-sedlex";
   version = "1.99.5";
 
-  src = fetchzip {
-    url = "https://github.com/ocaml-community/sedlex/archive/fb84e1766fc4b29e79ec40029ffee5cdb37b392f.tar.gz";
-    sha256 = "0phnqyn6mpv5byr1kkphl24y9q9fb2k3xg9yb457h5816q6ya72n";
+  src = fetchFromGitHub {
+    owner = "ocaml-community";
+    repo = "sedlex";
+    rev = "fb84e1766fc4b29e79ec40029ffee5cdb37b392f";
+    sha256 = "sha256-VhzlDTYBFXgKWT69PqZYLuHkiaDwzhmyX2XfaqzHFl4=";
   };
 
   buildInputs = [ ocaml findlib ];