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nix-shell: explain the merging property close to the example
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@ -317,13 +317,14 @@ while (my $token = $p->get_tag("a")) {
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</para>
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</para>
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<para>Finally, the following Haskell script uses a specific branch of
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<para>Finally, using the merging of multiple nix-shell shebangs the
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Nixpkgs/NixOS (the 14.12 stable branch):
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following Haskell script uses a specific branch of Nixpkgs/NixOS (the
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18.03 stable branch):
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<programlisting><![CDATA[
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<programlisting><![CDATA[
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#! /usr/bin/env nix-shell
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#! /usr/bin/env nix-shell
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#! nix-shell -i runghc -p haskellPackages.ghc haskellPackages.HTTP haskellPackages.tagsoup
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#! nix-shell -i runghc -p haskellPackages.ghc haskellPackages.HTTP haskellPackages.tagsoup
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#! nix-shell -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-14.12.tar.gz
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#! nix-shell -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-18.03.tar.gz
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import Network.HTTP
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import Network.HTTP
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import Text.HTML.TagSoup
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import Text.HTML.TagSoup
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