diff --git a/pkgs/development/tools/deadnix/default.nix b/pkgs/development/tools/deadnix/default.nix
index 98bb9bc0544b..daea07c9ba3e 100644
--- a/pkgs/development/tools/deadnix/default.nix
+++ b/pkgs/development/tools/deadnix/default.nix
@@ -5,16 +5,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "deadnix";
-  version = "1.2.0";
+  version = "1.2.1";
 
   src = fetchFromGitHub {
     owner = "astro";
     repo = "deadnix";
     rev = "v${version}";
-    sha256 = "sha256-IcxupBqG3/h13sHgNYcO/oHKYfnK1LYd8Ehercz/Z/w=";
+    hash = "sha256-xaaXGzTd+t1GjD2KpiS/c8acv6bXufv/lTN+ACRGVJw=";
   };
 
-  cargoSha256 = "sha256-8l4V9AWrBBnEsdZ0Vs4ruPdu+WQVo2ZbJBmhmo23s2g=";
+  cargoHash = "sha256-14onbdsactPJ27GTzG+culsdnwHvGdDXwBD9ZMq192Q=";
 
   meta = with lib; {
     description = "Find and remove unused code in .nix source files";