nixpkgs docs: Point to pkgs.extend, pkgs.appendOverlays and improve override section

2018-10-18 10:48:43 +02:00
parent ba8b54fa4a
commit 9b7654f6ff
2 changed files with 20 additions and 3 deletions
@@ -30,10 +30,16 @@
      itself is given, then that is used.
     </para>
     <para>
-      This can be passed explicitly when importing nipxkgs, for example
+      This can be passed explicitly when importing nixpkgs, for example
      <literal>import &lt;nixpkgs> { overlays = [ overlay1 overlay2 ];
      }</literal>.
     </para>
+     <para>
+      Further overlays can be added by calling the
+      <literal>pkgs.extend</literal> or <literal>pkgs.appendOverlays</literal>,
+      although it is often preferable to avoid these functions, because they
+      recompute the Nixpkgs fixpoint, which is somewhat expensive to do.
+     </para>
    </listitem>
    <listitem>
     <para>