Initial commit

simple-shell/README.md

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+# shell
+
+## Usage
+
+```sh
+> nix-shell shell.nix --command "cowsay hey"
+ _____
+< hey >
+ -----
+        \   ^__^
+         \  (oo)\_______
+            (__)\       )\/\
+                ||----w |
+                ||     ||
+
+> nix-shell shell2.nix --command "nvim --version"
+NVIM v0.9.5
+Build type: Release
+LuaJIT 2.1.1693350652
+```

simple-shell/shell.nix

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+with
+  import <nixpkgs> {};
+mkShell {
+  packages = [
+    cowsay
+  ];
+}

simple-shell/shell2.nix

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+{ pkgs ? import <nixpkgs> { } }:
+with pkgs;
+mkShell
+{
+  packages = [
+    neovim
+  ];
+}
+