diff --git a/doc/flatpak-manifest.xml b/doc/flatpak-manifest.xml
index 10aed1e7..ab5c9e1a 100644
--- a/doc/flatpak-manifest.xml
+++ b/doc/flatpak-manifest.xml
@@ -509,6 +509,7 @@
(array of strings)An array of commands to run during build (between make and make install if those are used).
This is primarily useful when using the "simple" buildsystem.
+ Each command is run in /bin/sh -c, so it can use standard POSIX shell syntax such as piping output.