diff --git a/nix/itm-tools.nix b/nix/itm-tools.nix
deleted file mode 100644
index c92e7dc..0000000
--- a/nix/itm-tools.nix
+++ /dev/null
@@ -1,21 +0,0 @@
-{ stdenv, fetchFromGitHub, rustPlatform, pkg-config }:
-
-rustPlatform.buildRustPackage rec {
-  version = "2019-11-15";
-  pname = "itm-tools";
-
-  src = fetchFromGitHub {
-    owner = "japaric";
-    repo = "itm-tools";
-    rev = "e94155e44019d893ac8e6dab51cc282d344ab700";
-    sha256 = "19xkjym0i7y52cfhvis49c59nzvgw4906cd8bkz8ka38mbgfqgiy";
-  };
-
-  cargoPatches = [ ./itm-tools-cargo-lock.patch ];
-
-  cargoSha256 = "0is702s14pgvd5i2m8aaw3zcsshqrwj97mjgg3wikbc627pagzg7";
-
-  nativeBuildInputs = [ pkg-config ];
-
-  doCheck = false;
-}
\ No newline at end of file
diff --git a/shell.nix b/shell.nix
index fb65df1..3ced199 100644
--- a/shell.nix
+++ b/shell.nix
@@ -8,8 +8,6 @@ with pkgs;
 let
   rustPlatform = callPackage ./nix/rustPlatform.nix {};
 
-  itm-tools = callPackage ./nix/itm-tools.nix { inherit rustPlatform; };
-
   runHelp = writeShellScriptBin "run-help" ''
     echo "[Common Tools]"
     echo "  run-openocd-f4x"
@@ -103,7 +101,7 @@ in
 stdenv.mkDerivation {
   name = "enc424j600-stm32-env";
   buildInputs = with rustPlatform.rust; [
-    rustc cargo pkgs.gdb pkgs.openocd pkgs.tmux itm-tools 
+    rustc cargo pkgs.gdb pkgs.openocd pkgs.tmux pkgs.itm-tools 
     runHelp runTmuxEnv killTmuxEnv
     runOpenOcdF4x runItmDemuxFollow
     exTxStm32f407 exTcpStm32f407