diff --git a/pkgs/development/ocaml-modules/lastfm/default.nix b/pkgs/development/ocaml-modules/lastfm/default.nix
index 88d23138d571..85d077a31758 100644
--- a/pkgs/development/ocaml-modules/lastfm/default.nix
+++ b/pkgs/development/ocaml-modules/lastfm/default.nix
@@ -6,7 +6,7 @@
   xmlplaylist,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "lastfm";
   version = "0.3.4";
 
@@ -15,7 +15,7 @@ buildDunePackage rec {
   src = fetchFromGitHub {
     owner = "savonet";
     repo = "ocaml-lastfm";
-    rev = "v${version}";
+    rev = "v${finalAttrs.version}";
     sha256 = "sha256-1te9B2+sUmkT/i2K5ueswWAWpvJf9rXob0zR4CMOJlg=";
   };
 
@@ -30,4 +30,4 @@ buildDunePackage rec {
     license = lib.licenses.lgpl21Only;
     maintainers = with lib.maintainers; [ dandellion ];
   };
-}
+})