import tex2nix bits

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+# tex2nix
+
+Generate Texlive environment containing all dependencies for your document
+rather than downloading gigabytes of texlive packages.
+
+## Installation
+
+With stable nix you can do:
+
+``` console
+nix-build && ./result/bin/tex2nix
+```
+
+If you use flakes put the following in your inputs
+
+```nix
+{
+  inputs.tex2nix.url = "github:Mic92/tex2nix";
+  inputs.tex2nix.inputs.utils.follows = "nixpkgs";
+}
+```
+
+or just do:
+
+```console
+$ nix run github:Mic92/tex2nix
+```
+
+
+## USAGE
+
+```console
+$ tex2nix main.tex
+wrote tex-env.nix
+$ cat tex-env.nix
+# Generated with tex2nix 0.0.0
+{ texlive }:
+(texlive.combine {
+    inherit (texlive) scheme-small;
+    "varwidth" = texlive."varwidth";
+    "tabu" = texlive."tabu";
+
+})
+```
+
+tex2nix does not follow `\input` or `\include`. However you can specify multiple
+texfiles as input
+
+```console
+$ tex2nix *.tex
+```
+
+The resulting expression can be imported like this to in your document directory:
+
+```nix
+# shell.nix
+with import <nixpkgs> {};
+mkShell {
+  buildInputs = [ (pkgs.callPackage ./tex-env.nix {}) ];
+}
+```
+
+``` console
+$ nix-shell shell.nix
+nix-shell> pdflatex --version
+pdfTeX 3.14159265-2.6-1.40.21 (TeX Live 2020/NixOS.org)
+...
+```