diff --git a/overlay.nix b/overlay.nix
index 1e2f350a..0e00a99e 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -61,6 +61,16 @@ let
     tagaspi = callPackage ./pkgs/tagaspi/default.nix { };
     tampi = callPackage ./pkgs/tampi/default.nix { };
     upc-qaire-exporter = prev.callPackage ./pkgs/upc-qaire-exporter/default.nix { };
+    upx = prev.upx.overrideAttrs {
+      version = "5.1.0";
+      src = final.fetchFromGitHub {
+        owner = "upx";
+        repo = "upx";
+        tag = "v5.1.0";
+        fetchSubmodules = true;
+        hash = "sha256-FQtDHsbZ/JrgRLwc2Wd2F5ZcBdqrU0YIT9hGQ0k0D+w=";
+      };
+    };
     wxparaver = callPackage ./pkgs/paraver/default.nix { };
   };