diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index 29c0bfe5a432..3de94c1ed5b8 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -4558,6 +4558,16 @@
       fingerprint = "4749 0887 CF3B 85A1 6355  C671 78C7 DD40 DF23 FB16";
     }];
   };
+  dpc = {
+    email = "dpc@dpc.pw";
+    github = "dpc";
+    githubId = 9209;
+    matrix = "@dpc:matrix.org";
+    name = "Dawid Ciężarkiewicz";
+    keys = [{
+      fingerprint = "0402 11D2 0830 2D71 5792 8197 86BB 1D5B 5575 7D38";
+    }];
+  };
   DPDmancul = {
     name = "Davide Peressoni";
     email = "davide.peressoni@tuta.io";
diff --git a/pkgs/tools/security/rblake2sum/default.nix b/pkgs/tools/security/rblake2sum/default.nix
new file mode 100644
index 000000000000..a5a4a1bce76c
--- /dev/null
+++ b/pkgs/tools/security/rblake2sum/default.nix
@@ -0,0 +1,28 @@
+{ lib
+, stdenv
+, rustPlatform
+, fetchFromGitHub
+, Security
+}:
+rustPlatform.buildRustPackage {
+  pname = "rblake2sum";
+  version = "0.3.1";
+
+  src = fetchFromGitHub {
+    owner = "crev-dev";
+    repo = "rblake2sum";
+    rev = "cdbaba9f198bd28bfad2fbc17011ce5c8c7ad957";
+    hash = "sha256-bzOjJ+/M0YWY4/r8cNARPVqbuLBeTllqFyVXhJz6ZMI=";
+  };
+
+  cargoHash = "sha256-egwL3z7uB4AcRwPT0uPrenyh4FSxhbZKMdkPhRztMbs=";
+
+  buildInputs = lib.optionals stdenv.isDarwin [ Security ];
+
+  meta = with lib; {
+    description = "A recursive blake2 digest (hash) of a file-system path";
+    homepage = "https://github.com/crev-dev/rblake2sum";
+    license = [ licenses.mit ];
+    maintainers = with maintainers; [ dpc ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4bd4637e6c50..38b4dd9d0077 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6300,6 +6300,10 @@ with pkgs;
 
   rare = python3Packages.callPackage ../games/rare { };
 
+  rblake2sum = callPackage ../tools/security/rblake2sum {
+      inherit (darwin.apple_sdk.frameworks) Security;
+  };
+
   reg = callPackage ../tools/virtualization/reg { };
 
   retool = callPackage ../applications/misc/retool { };