diff --git a/buildbox/build-telegram.sh b/buildbox/build-telegram.sh
index 6ad9d7bb1e..a30b45ce5b 100644
--- a/buildbox/build-telegram.sh
+++ b/buildbox/build-telegram.sh
@@ -6,7 +6,7 @@ BUILD_TELEGRAM_VERSION="1"
 
 MACOS_VERSION="10.15"
 XCODE_VERSION="11.1"
-GUEST_SHELL="zsh"
+GUEST_SHELL="bash"
 
 VM_BASE_NAME="macos$(echo $MACOS_VERSION | sed -e 's/\.'/_/g)_Xcode$(echo $XCODE_VERSION | sed -e 's/\.'/_/g)"
 
diff --git a/buildbox/guest-build-telegram.sh b/buildbox/guest-build-telegram.sh
index 1f7b87f67a..b094f67104 100644
--- a/buildbox/guest-build-telegram.sh
+++ b/buildbox/guest-build-telegram.sh
@@ -1,7 +1,5 @@
 #!/bin/sh
 
-set -x
-
 if [ -z "BUILD_NUMBER" ]; then
 	echo "BUILD_NUMBER is not set"
 	exit 1