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Merge pull request #19496 from Ericson2314/overridePackages

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Make `overridePackages` extend rather than replace existing overrides
This commit is contained in:
Charles Strahan
2016-10-26 14:01:13 -04:00
committed by GitHub
parent 6f1f1d86c1 3ca3b145ea
commit ca2b03439f
4 changed files with 77 additions and 64 deletions
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14
doc/functions.xml
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@@ -52,6 +52,20 @@ in ...</programlisting>
It's equivalent to <varname>pkgs</varname> in the above example.
</para>
<para>
Note that in previous versions of nixpkgs, this method replaced any changes from <link
linkend="sec-modify-via-packageOverrides">config.packageOverrides</link>,
along with that from previous calls if this function was called repeatedly.
Now those previous changes will be preserved so this function can be "chained" meaningfully.
To recover the old behavior, make sure <varname>config.packageOverrides<varname> is unset,
and call this only once off a "freshly" imported nixpkgs:
<programlisting>let
pkgs = import &lt;nixpkgs&gt; { config: {}; };
newpkgs = pkgs.overridePackages ...;
in ...</programlisting>
</para>
</section>
<section xml:id="sec-pkg-override">