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diff --git a/manual/install.texi b/manual/install.texi
index 63c41b0..c502446 100644
--- a/manual/install.texi
+++ b/manual/install.texi
@@ -157,6 +157,16 @@ By default, dynamic tests are linked to run with the installed C library.
This option hardcodes the newly built C library path in dynamic tests
so that they can be invoked directly.
+@item --disable-timezone-tools
+By default, timezone related utilities (@command{zic}, @command{zdump},
+and @command{tzselect}) are installed with glibc. If you are building
+these independently (e.g. by using the @samp{tzcode} package), then this
+option will allow disabling the install of these too.
+
+Note that you need to make sure the external tools are kept in sync with
+the versions that @theglibc{} expects as the data formats may change over
+time. Consult the @file{timezone} subdirectory for more details.
+
@item --enable-lock-elision=yes
Enable lock elision for pthread mutexes by default.