Scatter blog post ideas for "Let's Learn Nix"

I may not use any of these. I'm just scrawling notes as blog posts to see if
anything sticks.

blog/content/english/lets-learn-nix-tutorial-reproducibility.md

@@ -0,0 +1,41 @@
+---
+title: "Lets Learn Nix: Tutorial Reproducibility"
+date: 2020-03-17T18:34:58Z
+draft: true
+---
+
+## Install Nix
+
+Link to nixos page.
+
+## The rest
+
+Start with this...
+
+```shell
+$ mkdir ~/lets-learn-nix
+$ cd ~/lets-learn-nix
+```
+
+...done. Copy the following and paste it into a file name `shell.nix`.
+
+```nix
+# file: shell.nix
+let
+  pkgs = import (builtins.fetchGit {
+    url = "https://github.com/NixOS/nixpkgs-channels";
+    ref = "refs/heads/nixos-19.09";
+  }) {}
+in pkgs.mkShell {
+  buildInputs = with pkgs; [
+    git
+  ];
+  NIX_PATH = "nixpkgs=${pkgs}";
+};
+```
+
+...then...
+
+```shell
+$ nix-shell
+```