diff --git a/packages/os.sh b/packages/os.sh
index 85c4848..c925ed0 100644
--- a/packages/os.sh
+++ b/packages/os.sh
@@ -52,7 +52,7 @@ fi
 
 if [ -f /etc/os-release ]; then
 	(
-		source /etc/os-release
+		. /etc/os-release
 		add_tag "os:${ID}"
 		if [ ! -z "${ID_LIKE}" ]; then
 			add_tag "os_like:${ID_LIKE}"
diff --git a/packages/packages.sh b/packages/packages.sh
index e146eb1..942033e 100755
--- a/packages/packages.sh
+++ b/packages/packages.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-source ./os.sh
+. ./os.sh
 
 apt_install() {
 	DEBIAN_FRONTEND="noninteractive" apt-get install -y "$@"