diff --git a/cargosha256-dual-iir.nix b/cargosha256-dual-iir.nix
new file mode 100644
index 0000000..093bee6
--- /dev/null
+++ b/cargosha256-dual-iir.nix
@@ -0,0 +1 @@
+"1hzli0970p8w70mdzic0qgmpdnz2l8zchzf86fadnvpvr1y1yb4q"
diff --git a/cargosha256.nix b/cargosha256.nix
deleted file mode 100644
index cb6b230..0000000
--- a/cargosha256.nix
+++ /dev/null
@@ -1 +0,0 @@
-"1hz1s4hbdrxzhmxg3hvzv1n9xnz4h3l76411ch8c664csr9spv2r"