diff --git a/pkgs/development/ocaml-modules/alsa/default.nix b/pkgs/development/ocaml-modules/alsa/default.nix
index bc4c994dc525..fdf08692138f 100644
--- a/pkgs/development/ocaml-modules/alsa/default.nix
+++ b/pkgs/development/ocaml-modules/alsa/default.nix
@@ -6,7 +6,7 @@
   alsa-lib,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "alsa";
   version = "0.3.0";
 
@@ -15,7 +15,7 @@ buildDunePackage rec {
   src = fetchFromGitHub {
     owner = "savonet";
     repo = "ocaml-alsa";
-    rev = version;
+    rev = finalAttrs.version;
     sha256 = "1qy22g73qc311rmv41w005rdlj5mfnn4yj1dx1jhqzr31zixl8hj";
   };
 
@@ -28,4 +28,4 @@ buildDunePackage rec {
     license = lib.licenses.gpl2Only;
     maintainers = with lib.maintainers; [ dandellion ];
   };
-}
+})