diff --git a/wfmash.nix b/wfmash.nix
index 25a5ab95..2d08a758 100644
--- a/wfmash.nix
+++ b/wfmash.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
     owner = "waveygang"; 
     repo = "wfmash";
     rev = "1b63993e8630237cb61f0ef34e380a9eb23702f8";
-    sha256 = "1z54qm5297a363haky8bl2bzi1bdq9k17qgql7fjw5fa06kyqzb7";
+    sha256 = "sha256-KPjge/83CCj+AXAxQmt0Fsbcy7mNnGzH41l9oiebRPQ=";
   };
 
   nativeBuildInputs = [ cmake makeWrapper ];