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nix-shell: document double quotes being necessary for a simple Nix expression in the shebang

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Graham Christensen 2018-09-19 13:01:27 -04:00
parent 10a7f19937
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doc/manual/command-ref/nix-shell.xml
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@ -317,6 +317,20 @@ while (my $token = $p->get_tag("a")) {
</para>
<para>Sometimes you need to pass a simple Nix expression to customize
a package like Terraform:
<programlisting><![CDATA[
#! /usr/bin/env nix-shell
#! nix-shell -i bash -p "terraform.withPlugins (plugins: [ plugins.openstack ])"
terraform apply
]]></programlisting>
<note><para>You must use double quotes (<literal>"</literal>) when
passing a simple Nix expression in a nix-shell shebang.</para></note>
</para>
<para>Finally, using the merging of multiple nix-shell shebangs the
following Haskell script uses a specific branch of Nixpkgs/NixOS (the
18.03 stable branch):