1 files changed, 5 insertions, 2 deletions
diff --git a/INSTALL b/INSTALL
index f296ea8..7c7516d 100644
--- a/INSTALL
+++ b/INSTALL
@@ -94,11 +94,14 @@ $ xcode-select --install
     $ cd build2/
     $ ./bootstrap
     $ cd ..
-    $ ./build2/build2/b-boot update
+    $ ./build2/build2/b-boot build2/
 
     For more information on this step (for example, how to specify the C++
     compiler, options, etc.), refer to the INSTALL file in the build2/
-    subdirectory of build2-toolchain.
+    subdirectory of build2-toolchain. Note that you must use global overrides
+    (!) if specifying any config.* variables on the last line. For example:
+
+    $ ./build2/build2/b-boot '!config.cxx=clang++' build2/
 
 4. Configuring, Building, and Installing the Rest of the Toolchain