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Merge pull request #47430 from roberth/nixpkgs-extend

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pkgs.extend for adding overlays
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John Ericson 2018-10-23 20:21:48 -04:00 • committed by GitHub
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13
doc/functions/overrides.xml
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@ -6,8 +6,14 @@
<para>
Sometimes one wants to override parts of <literal>nixpkgs</literal>, e.g.
derivation attributes, the results of derivations or even the whole package
set.
derivation attributes, the results of derivations.
</para>
<para>
These functions are used to make changes to packages, returning only single
packages. <link xlink:href="#chap-overlays">Overlays</link>, on the other
hand, can be used to combine the overridden packages across the entire
package set of Nixpkgs.
</para>
<section xml:id="sec-pkg-override">
@ -25,6 +31,9 @@
<para>
Example usages:
<programlisting>pkgs.foo.override { arg1 = val1; arg2 = val2; ... }</programlisting>
<!-- TODO: move below programlisting to a new section about extending and overlays
and reference it
-->
<programlisting>
import pkgs.path { overlays = [ (self: super: {
foo = super.foo.override { barSupport = true ; };