diff --git a/pkgs/tools/misc/mcfly/default.nix b/pkgs/tools/misc/mcfly/default.nix
index db697bc9d511..4ea27ce092f7 100644
--- a/pkgs/tools/misc/mcfly/default.nix
+++ b/pkgs/tools/misc/mcfly/default.nix
@@ -2,13 +2,12 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "mcfly";
-  version = "v0.3.1";
-  rev = version;
+  version = "0.3.1";
 
   src = fetchFromGitHub {
-    inherit rev;
     owner = "cantino";
     repo = "mcfly";
+    rev = "v${version}";
     sha256 = "0pmyw21zns4zn7pffji4yvbj63fx3g15cx81pk4bs6lzyz5zbdc2";
   };