>>>>> On Sun, 5 Dec 2010, Ciaran McCreesh wrote:

>> >>  - Calling pkg_pretend.

> pkg_pretend's sandboxed and isn't supposed to be modifying /, so
> that should be ok.

Then pkg_pretend should be mentioned as a further exception (unless we
decide that the whole section should be removed):

--- ebuild-env-invariancy.tex~
+++ ebuild-env-invariancy.tex
@@ -7,8 +7,8 @@
 \item Variancy is any package manager action that modifies either
     \t{ROOT} or \t{/} in any way that isn't merely a simple addition of
     something that doesn't alter other packages. This includes any
-    non-default call to any \t{pkg} phase function except \t{pkg\_setup},
-    a merge of any package or an unmerge of any package.
+    non-default call to any \t{pkg} phase function except \t{pkg\_pretend}
+    and \t{pkg\_setup}, a merge of any package or an unmerge of any package.
 \item As an exception, changes to \t{DISTDIR} do not count as variancy.
 \item The \t{pkg\_setup} function may be assumed not to introduce variancy.
     Thus, ebuilds must not perform variant actions in this phase.