Separate emscripten build directory

This avoids the need to 'make clean' before you do a simulator build
(or vice-versa).

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index 90ce5119..b2601da3 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,7 @@ You may want to test out changes in the emulator first. To do this, you'll need
 ```
 cd movement/make
 emmake make
-python3 -m http.server 8000 -d build
+python3 -m http.server -d build-sim
 ```
 
 Finally, visit [watch.html](http://localhost:8000/watch.html) to see your work.