diff --git a/binder/apt.txt b/binder/apt.txt
index 1d1ab49a..e416b9d2 100644
--- a/binder/apt.txt
+++ b/binder/apt.txt
@@ -1,2 +1,3 @@
 octave
 liboctave-dev
+tree
diff --git a/binder/postBuild b/binder/postBuild
index e0ce1aac..effa7ebe 100644
--- a/binder/postBuild
+++ b/binder/postBuild
@@ -1,4 +1,3 @@
 cd ${HOME}
 cd lib/JSONio; mkoctfile --mex jsonread.c jsmn.c -DJSMN_PARENT_LINKS; cd ..
-sudo apt-get install tree