setup nix shell

shell.nix

@@ -0,0 +1,20 @@
+# This defines a function taking `pkgs` as parameter, and uses
+# `nixpkgs` by default if no argument is passed to it.
+{ pkgs ? import <nixpkgs> {} }:
+
+# Thisa void typings `pkgs.` before each package name.
+with pkgs;
+
+# Defines a shell.
+mkShell {
+	# Sets the build inputs, i.e. what will be available in our
+	# local environment.
+	buildInputs = [
+		cargo
+		gcc
+		go
+		gnumake
+		protobuf
+		rustc
+	];
+}