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docs: mention source of env variables used by impureEnvVars.

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Gleb Peregud 2018-05-02 22:07:23 +02:00
parent 53ec5ac69f
commit 5ba6395378
1 changed files with 7 additions and 1 deletions
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8
doc/manual/expressions/advanced-attributes.xml
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@ -112,7 +112,13 @@ impureEnvVars = [ "http_proxy" "https_proxy" <replaceable>...</replaceable> ];
linkend="fixed-output-drvs">fixed-output derivations</link>, where
impurities such as these are okay since (the hash of) the output
is known in advance. It is ignored for all other
derivations.</para></listitem>
derivations.</para>
<warning><para><varname>impureEnvVars</varname> implementation takes
environment variables from the current builder process. When a daemon is
building its environmental variables are used. Without the daemon, the
environmental variables come from the environment of the
<command>nix-build</command>.</para></warning></listitem>
</varlistentry>