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-rw-r--r--pkgs/development/ocaml-modules/fieldslib/default.nix7
1 files changed, 4 insertions, 3 deletions
diff --git a/pkgs/development/ocaml-modules/fieldslib/default.nix b/pkgs/development/ocaml-modules/fieldslib/default.nix
index 4adddbfe54d2e..c84d1bf579b1f 100644
--- a/pkgs/development/ocaml-modules/fieldslib/default.nix
+++ b/pkgs/development/ocaml-modules/fieldslib/default.nix
@@ -6,11 +6,12 @@ if lib.versionAtLeast ocaml.version "4.06"
 then throw "fieldslib-109.20.03 is not available for OCaml ${ocaml.version}"
 else
 
-stdenv.mkDerivation {
-  name = "ocaml-fieldslib-109.20.03";
+stdenv.mkDerivation rec {
+  pname = "ocaml-fieldslib";
+  version = "109.20.03";
 
   src = fetchurl {
-    url = "https://ocaml.janestreet.com/ocaml-core/109.20.00/individual/fieldslib-109.20.03.tar.gz";
+    url = "https://ocaml.janestreet.com/ocaml-core/${lib.versions.majorMinor version}.00/individual/fieldslib-${version}.tar.gz";
     sha256 = "1dkzk0wf26rhvji80dz1r56dp6x9zqrnp87wldd4pj56jli94vir";
   };