diff --git a/pkgs/development/tools/rust/maturin/pyo3-test/generic.nix b/pkgs/development/tools/rust/maturin/pyo3-test/generic.nix
index 41175ad8538..a5713d944a8 100644
--- a/pkgs/development/tools/rust/maturin/pyo3-test/generic.nix
+++ b/pkgs/development/tools/rust/maturin/pyo3-test/generic.nix
@@ -27,7 +27,7 @@ python.pkgs.buildPythonPackage rec {
   cargoDeps = rustPlatform.fetchCargoTarball {
     inherit src patches;
     name = "${pname}-${version}";
-    hash = "sha256-//TmozgWy9zrSpMKX92XdHj4fw/T1Elfgn4YhhR7ot0=";
+    hash = "sha256-u3L9nXHKILznyZTgxdvZyOCQZFZhuADrtI7zXYQzrbE=";
   };
 
   patches = [ ./Cargo.lock.patch ];