Update doc/manual/src/command-ref/nix-shell.md

Co-authored-by: Cole Helbling <cole.e.helbling@outlook.com>
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Mauricio Scheffer 2021-02-16 23:27:04 +00:00 committed by GitHub
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@ -238,7 +238,7 @@ branch):
```haskell
#! /usr/bin/env nix-shell
#! nix-shell -i runghc -p "haskellPackages.ghcWithPackages (ps: [ps.download-curl ps.tagsoup])"
#! nix-shell -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-20.03.tar.gz
#! nix-shell -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/nixos-20.03.tar.gz
import Network.Curl.Download
import Text.HTML.TagSoup