android: Fix typo in Mac steps

diff --git a/BUILD.md b/BUILD.md
index 923ab5a..a248c4c 100644 (file)
--- a/BUILD.md
+++ b/BUILD.md
@@ -178,7 +178,7 @@ brew install python3
 pip install --upgrade pip
 pip install lxml
 pip3.5 install --upgrade pip
-pip3.5 install lxm
+pip3.5 install lxml
 ```
 ### Build steps for Android
 Use the following to ensure the Android build works.