diff --git a/docs/get_started/cmake_options_and_variables.md b/docs/get_started/cmake_options_and_variables.md
index 8e121fc..3f3dbdd 100644
--- a/docs/get_started/cmake_options_and_variables.md
+++ b/docs/get_started/cmake_options_and_variables.md
@@ -63,17 +63,21 @@
 
 #### `IREE_HAL_DRIVERS_TO_BUILD`:STRING
 
-*This does not have any effect at the moment, but will be supported in the
-future!* Semicolon-separated list of HAL drivers to build, or `all` for building
-all HAL drivers. Case-insensitive. Defaults to `all`. Example:
+*Righ now this only affects whether tests are enabled when compiling for
+Android; it will be fully supported in the future!*
+
+Semicolon-separated list of HAL drivers to build, or `all` for building all HAL
+drivers. Case-insensitive. Defaults to `all`. Example:
 `-DIREE_HAL_DRIVERS_TO_BUILD="Vulkan;VMLA"`.
 
 #### `IREE_TARGET_BACKENDS_TO_BUILD`:STRING
 
-*This does not have any effect at the moment, but will be supported in the
-future!* Semicolon-separated list of HAL drivers to build, or `all` for building
-all HAL drivers. Case-insensitive. Defaults to `all`. Example:
-`-DIREE_HAL_DRIVERS_TO_BUILD="Vulkan_SPIRV;VMLA"`.
+*Righ now this only affects whether tests are enabled when compiling for
+Android; it will be fully supported in the future!*
+
+Semicolon-separated list of HAL drivers to build, or `all` for building all
+compiler target backends. Case-insensitive. Defaults to `all`. Example:
+`-DIREE_HAL_DRIVERS_TO_BUILD="Vulkan-SPIRV;VMLA"`.
 
 #### `IREE_ENABLE_LLD`:BOOL