diff --git a/pkgs/by-name/mv/mvfst/package.nix b/pkgs/by-name/mv/mvfst/package.nix
index c1eb7036f5fd..0c59fcaccdcb 100644
--- a/pkgs/by-name/mv/mvfst/package.nix
+++ b/pkgs/by-name/mv/mvfst/package.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation (finalAttrs: {
     owner = "facebook";
     repo = "mvfst";
     rev = "refs/tags/v${finalAttrs.version}";
-    sha256 = "sha256-KjNTDgpiR9EG42Agl2JFJoPo5+8GlS27oPMWpdLq2v8=";
+    hash = "sha256-KjNTDgpiR9EG42Agl2JFJoPo5+8GlS27oPMWpdLq2v8=";
   };
 
   nativeBuildInputs = [ cmake ];