1 files changed, 6 insertions, 0 deletions
diff --git a/INSTALL.md b/INSTALL.md
index 74398ed5..750a2e33 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -40,3 +40,9 @@ On Debian or Ubuntu based distributions, you need to install the
 `gobject-introspection` bindings for some dependencies like `libvirt-glib`
 and `libosinfo`. Look for package names that start with `'gir'`, for example
 `gir1.2-libosinfo-1.0`.
+
+
+## Optional software
+
+`virt-manager` can optionally use [libguestfs](http://libguestfs.org/)
+for inspecting the guests.  For this, `python-libguestfs` >= 1.22 is needed.