diff --git a/pkgs/development/ocaml-modules/sedlex/default.nix b/pkgs/development/ocaml-modules/sedlex/default.nix
index 2d1746bde0f..6fcdb5ec6fa 100644
--- a/pkgs/development/ocaml-modules/sedlex/default.nix
+++ b/pkgs/development/ocaml-modules/sedlex/default.nix
@@ -3,7 +3,7 @@
 assert stdenv.lib.versionAtLeast ocaml.version "4.02";
 
 stdenv.mkDerivation rec {
-  name = "ocaml${ocaml.version}-${version}";
+  name = "ocaml${ocaml.version}-sedlex-${version}";
   version = "1.99.3";
 
   src = fetchzip {