diff --git a/flavours/freertos/local.conf.sample b/flavours/freertos/local.conf.sample
index 66f0ffdc5a74cf089693381f0ffd54121d2b0eb1..ec87702d8248b74853c4bd20b3112563ddfb7172 100644
--- a/flavours/freertos/local.conf.sample
+++ b/flavours/freertos/local.conf.sample
@@ -72,8 +72,11 @@ CONF_VERSION = "1"
 # Use OSTC download cache default.
 # Note that this cache is limited to system configurations that are entirely
 # re-distributable, as determined by the OSTC legal team.
-INHERIT += "own-mirrors"
-SOURCE_MIRROR_URL = "https://cache.ostc-eu.org/bitbake/downloads"
+#
+# The mirror is temporarily out of service.
+#
+# INHERIT += "own-mirrors"
+# SOURCE_MIRROR_URL = "https://cache.ostc-eu.org/bitbake/downloads"
 
 # If you are building on a very slow device but have relatively reliable network access
 # *and* the project you are building has a public sstate cache, you may choose to uncomment
diff --git a/flavours/linux/local.conf.sample b/flavours/linux/local.conf.sample
index a2d408b08985c1be84b478b50988f6b72846d71f..09bd77f753db8c1846601c0347e5751e38421564 100644
--- a/flavours/linux/local.conf.sample
+++ b/flavours/linux/local.conf.sample
@@ -253,8 +253,11 @@ CONF_VERSION = "1"
 # Use OSTC download cache default.
 # Note that this cache is limited to system configurations that are entirely
 # re-distributable, as determined by the OSTC legal team.
-INHERIT += "own-mirrors"
-SOURCE_MIRROR_URL = "https://cache.ostc-eu.org/bitbake/downloads"
+#
+# The mirror is temporarily out of service.
+#
+# INHERIT += "own-mirrors"
+# SOURCE_MIRROR_URL = "https://cache.ostc-eu.org/bitbake/downloads"
 
 # If you are building on a very slow device but have relatively reliable network access
 # *and* the project you are building has a public sstate cache, you may choose to uncomment
diff --git a/flavours/zephyr/local.conf.sample b/flavours/zephyr/local.conf.sample
index 7e929c56cb4f46f47597b398bfbcc7981e20a076..dd2834beddc5627af5ae551eecc004b85db3baa4 100644
--- a/flavours/zephyr/local.conf.sample
+++ b/flavours/zephyr/local.conf.sample
@@ -255,8 +255,11 @@ CONF_VERSION = "1"
 # Use OSTC download cache default.
 # Note that this cache is limited to system configurations that are entirely
 # re-distributable, as determined by the OSTC legal team.
-INHERIT += "own-mirrors"
-SOURCE_MIRROR_URL = "https://cache.ostc-eu.org/bitbake/downloads"
+#
+# The mirror is temporarily out of service.
+#
+# INHERIT += "own-mirrors"
+# SOURCE_MIRROR_URL = "https://cache.ostc-eu.org/bitbake/downloads"
 
 # If you are building on a very slow device but have relatively reliable network access
 # *and* the project you are building has a public sstate cache, you may choose to uncomment