Add Nix derivation for Monero dependencies

README.md

@@ -200,6 +200,15 @@ then:
 
 [2] libnorm-dev is needed if your zmq library was built with libnorm, and not needed otherwise
 
+With [Nix](https://nix.dev/tutorials/first-steps/), enter a shell having all dependencies:
+(Tested on Nixpkgs 24.05, *aarch64-darwin* and *x86_64-darwin* platforms, macOS 15.1.)
+
+```
+% nix-shell --pure ./contrib/nix/local-build-shell.nix
+
+[nix-shell:~/monero]$ # ... now you can build ...
+```
+
 Install all dependencies at once on Debian/Ubuntu:
 
 ```

contrib/nix/local-build-shell.nix

@@ -0,0 +1,28 @@
+# Refer to README.md for how to invoke this.
+
+{ pkgs ? import <nixpkgs> {} }:
+pkgs.mkShell {
+  nativeBuildInputs = with pkgs.buildPackages; [
+    autoconf
+    cmake
+    git
+    libsodium
+    libunwind
+    openssl
+    protobuf
+    python3
+    readline
+    unbound
+    zeromq
+  ]  ++ lib.optionals stdenv.isDarwin [
+    darwin.apple_sdk.frameworks.IOKit
+  ];
+
+  buildInputs = with pkgs.buildPackages; [
+    boost
+  ];
+
+  cmakeFlags = [
+    "-DReadline_ROOT_DIR=${pkgs.buildPackages.readline.dev}"
+  ];
+}