diff --git a/PACKAGING.md b/PACKAGING.md
index 5e6560c34..f31252272 100644
--- a/PACKAGING.md
+++ b/PACKAGING.md
@@ -91,3 +91,8 @@ relevant to package maintainers:
 - `-Dcpu=baseline`: Build for the "baseline" CPU of the target architecture.
   This avoids building for newer CPU features that may not be available on
   all target machines.
+
+- `-Dtarget=$arch-$os-$abi`: Build for a specific target triple. This is
+  often necessary for system packages to specify a specific minimum Linux
+  version, glibc, etc. Run `zig targets` to a get a full list of available
+  targets.