1 files changed, 1 insertions, 0 deletions

diff --git a/README.md b/README.md
index 49644c0..1dca6b9 100755
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # lpunpack and lpmake
+To cross-compile you need `crossbuild-essential-arm64`/`crossbuild-essential-armel`/`crossbuild-essential-armhf` (sudo apt install $package).
 
 build:
 ./make.sh $ARCH