+=head1 ENVIRONMENT
+
+=head2 C<PERL_INDIRECT_PM_DISABLE>
+
+If this environment variable is set to true when the pragma is used for the first time, the XS code won't be loaded and, although the C<'indirect'> lexical hint will be set to true in the scope of use, the pragma itself won't do anything.
+In this case, the pragma will always be considered to be thread-safe, and as such L</I_THREADSAFE> will be true.
+This is useful for disabling C<indirect> in production environments.
+
+Note that clearing this variable after C<indirect> was loaded has no effect.
+If you want to reenable the pragma later, you also need to reload it by deleting the C<'indirect.pm'> entry from C<%INC>.
+