diff --git a/flavours/freertos/local.conf.sample b/flavours/freertos/local.conf.sample
index 7a5d0cb538e962c25254d847114248d356b944b2..ec868437f308efff4eaddeec4d3cd73456754a77 100644
--- a/flavours/freertos/local.conf.sample
+++ b/flavours/freertos/local.conf.sample
@@ -20,7 +20,7 @@ MACHINE ??= "qemuarmv5"
 #
 # Default policy config
 #
-DISTRO = "freertos"
+DISTRO ?= "freertos"
 
 #
 # Package Management configuration
diff --git a/flavours/linux/local.conf.sample b/flavours/linux/local.conf.sample
index 905e1190dca9ffe74e1ddff876f08de7b1bba311..e05362525dd2e7f8d03e8a2322ad11dd86b62965 100644
--- a/flavours/linux/local.conf.sample
+++ b/flavours/linux/local.conf.sample
@@ -74,7 +74,7 @@ MACHINE ??= "qemux86-64"
 #
 # Default policy config
 #
-DISTRO = "openharmony-linux"
+DISTRO ?= "openharmony-linux"
 
 #
 # Package Management configuration