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-+source = "registry+https://github.com/rust-lang/crates.io-index"
-+checksum = "bd80fc12f73063ac132ac92aceea36734f04a1d93c1240c6944e23a3b8841793"
-+dependencies = [
-+ "proc-macro2",
-+ "quote",
-+ "syn",
-+]
-+
-+[[package]]
-+name = "unicode-width"
-+version = "0.1.8"
-+source = "registry+https://github.com/rust-lang/crates.io-index"
-+checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
-+
-+[[package]]
-+name = "unicode-xid"
-+version = "0.2.1"
-+source = "registry+https://github.com/rust-lang/crates.io-index"
-+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
-+
-+[[package]]
-+name = "vec_map"
-+version = "0.8.2"
-+source = "registry+https://github.com/rust-lang/crates.io-index"
-+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
-+
-+[[package]]
-+name = "winapi"
-+version = "0.3.9"
-+source = "registry+https://github.com/rust-lang/crates.io-index"
-+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
-+dependencies = [
-+ "winapi-i686-pc-windows-gnu",
-+ "winapi-x86_64-pc-windows-gnu",
-+]
-+
-+[[package]]
-+name = "winapi-i686-pc-windows-gnu"
-+version = "0.4.0"
-+source = "registry+https://github.com/rust-lang/crates.io-index"
-+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-+
-+[[package]]
-+name = "winapi-x86_64-pc-windows-gnu"
-+version = "0.4.0"
-+source = "registry+https://github.com/rust-lang/crates.io-index"
-+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-+
-+[[package]]
-+name = "xmas-elf"
-+version = "0.6.2"
-+source = "registry+https://github.com/rust-lang/crates.io-index"
-+checksum = "22678df5df766e8d1e5d609da69f0c3132d794edf6ab5e75e7abcd2270d4cf58"
-+dependencies = [
-+ "zero",
-+]
-+
-+[[package]]
-+name = "zero"
-+version = "0.1.2"
-+source = "registry+https://github.com/rust-lang/crates.io-index"
-+checksum = "5f1bc8a6b2005884962297587045002d8cfb8dcec9db332f4ca216ddc5de82c5"
diff --git a/pkgs/development/tools/misc/itm-tools/default.nix b/pkgs/development/tools/misc/itm-tools/default.nix
index 0abdd0179013..7f027a217327 100644
--- a/pkgs/development/tools/misc/itm-tools/default.nix
+++ b/pkgs/development/tools/misc/itm-tools/default.nix
@@ -11,12 +11,19 @@ rustPlatform.buildRustPackage rec {
     sha256 = "19xkjym0i7y52cfhvis49c59nzvgw4906cd8bkz8ka38mbgfqgiy";
   };
 
-  cargoPatches = [ ./cargo-lock.patch ];
-
-  cargoSha256 = "1hqv530x8k4rf9zzyl5p5z58bymk1p4qwrcxs21gr0zm2hqjlxy4";
+  cargoLock = {
+    lockFile = ./Cargo.lock;
+    outputHashes = {
+      "itm-0.4.0" = "sha256-T61f1WvxEMhI5bzp8FuMYWiG1YOPJvWuBJfK/gjuNKI=";
+    };
+  };
 
   nativeBuildInputs = [ pkg-config ];
 
+  postPatch = ''
+    ln -s ${./Cargo.lock} Cargo.lock
+  '';
+
   doCheck = false;
 
   meta = with lib; {