Add note about passing through env var with docker

1 files changed, 3 insertions, 0 deletions

diff --git a/README.rst b/README.rst
index 4f33c00..5a5413e 100644
--- a/README.rst
+++ b/README.rst
@@ -31,6 +31,9 @@ To build the javascript bindings, install emscripten from http://kripken.github.
 
     make js
 
+Note that if you run emscripten in a docker container, you need to pass through
+the EMCC_CLOSURE_ARGS environment variable.
+
 To build the android project for Android bindings, run:
 
 .. code:: bash