1 files changed, 10 insertions, 8 deletions
diff --git a/nixpkgs/pkgs/development/ocaml-modules/calendar/default.nix b/nixpkgs/pkgs/development/ocaml-modules/calendar/default.nix
index 1210ed41dc2b..29927aae04a7 100644
--- a/nixpkgs/pkgs/development/ocaml-modules/calendar/default.nix
+++ b/nixpkgs/pkgs/development/ocaml-modules/calendar/default.nix
@@ -1,21 +1,23 @@
-{stdenv, lib, fetchurl, ocaml, findlib}:
+{ stdenv, lib, fetchurl, ocaml, findlib }:
+
+stdenv.mkDerivation rec {
+  pname = "ocaml-calendar";
+  version = "2.5";
 
-stdenv.mkDerivation {
-  name = "ocaml-calendar-2.5";
   src = fetchurl {
-    url = "https://forge.ocamlcore.org/frs/download.php/915/calendar-2.5.tar.bz2";
+    url = "https://forge.ocamlcore.org/frs/download.php/915/calendar-${version}.tar.bz2";
     sha256 = "04pvhwb664g3s644c7v7419a3kvf5s3pynkhmk5j59dvlfm1yf0f";
-    };
+  };
 
-  buildInputs = [ocaml findlib];
+  buildInputs = [ ocaml findlib ];
 
   createFindlibDestdir = true;
 
-  meta =  {
+  meta = {
     homepage = "https://forge.ocamlcore.org/projects/calendar/";
     description = "An Objective Caml library managing dates and times";
     license = "LGPL";
-    platforms = ocaml.meta.platforms or [];
+    platforms = ocaml.meta.platforms or [ ];
     maintainers = [
       lib.maintainers.gal_bolle
     ];