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-rw-r--r--esp8266/README.md6
1 files changed, 6 insertions, 0 deletions
diff --git a/esp8266/README.md b/esp8266/README.md
index 0509a3799b..5965fa4bce 100644
--- a/esp8266/README.md
+++ b/esp8266/README.md
@@ -39,6 +39,12 @@ $ git submodule update --init
See the README in the repository root for more information about external
dependencies.
+The MicroPython cross-compiler must be built to pre-compile some of the
+built-in scripts to bytecode. This can be done using:
+```bash
+$ make -C mpy-cross
+```
+
Then, to build MicroPython for the ESP8266, just run:
```bash
$ cd esp8266