diff --git a/nix/itm.nix b/nix/itm.nix
index f9fb5f9..970d5cb 100644
--- a/nix/itm.nix
+++ b/nix/itm.nix
@@ -13,7 +13,7 @@ rustPlatform.buildRustPackage rec {
 
   cargoPatches = [ ./itm-cargo-lock.patch ];
 
-  cargoSha256 = "0xzpyafmkp2wvw2332kb1sm2m3lgg6qy6fskcq431d713ilvrkmg";
+  cargoSha256 = "1lgv8nhzbzfw9cl4rhj46a86h9jygz0ih3j4zw5nd1346xgmz7b8";
 
   nativeBuildInputs = [ pkgconfig ];
 
diff --git a/shell.nix b/shell.nix
index 74eeb7f..8c847fc 100644
--- a/shell.nix
+++ b/shell.nix
@@ -26,7 +26,7 @@ let
     echo "        - Run tx_stm32f407 example."
     echo "  tcp_stm32f407 <ip> <pref>"
     echo "        - Run tcp_stm32f407 example with the IPv4"
-    echo "          address <ip> \(dot-separated\) and prefix length <pref>."
+    echo "          address <ip> (dot-separated) and prefix length <pref>."
     echo ""
   '';