diff --git a/flavours/freertos/local.conf.sample b/flavours/freertos/local.conf.sample
index ec868437f308efff4eaddeec4d3cd73456754a77..66da7d807ad6248f5433d234bf93705ef7d3c905 100644
--- a/flavours/freertos/local.conf.sample
+++ b/flavours/freertos/local.conf.sample
@@ -69,3 +69,10 @@ EXTRA_IMAGE_FEATURES ?= "debug-tweaks"
 # track the version of this file when it was generated. This can safely be ignored if
 # this doesn't mean anything to you.
 CONF_VERSION = "1"
+
+# Use OSTC download and sstate-cache by default. You can comment out or remove
+# those lines and use the defaults from Poky. Note that this cache is limited
+# to system configurations that are entirely re-distributable.
+INHERIT += "own-mirrors"
+SOURCE_MIRROR_URL = "https://cache.ostc-eu.org/bitbake/downloads"
+SSTATE_MIRRORS = "file://.* https://cache.ostc-eu.org/bitbake/sstate-cache/PATH;downloadfilename=PATH \n"
diff --git a/flavours/linux/local.conf.sample b/flavours/linux/local.conf.sample
index 1b79cbcec26b9ff04ed048b308b019a75598b753..7ce5c1736faf23a2f0b76794bc212e8f20939e99 100644
--- a/flavours/linux/local.conf.sample
+++ b/flavours/linux/local.conf.sample
@@ -246,3 +246,10 @@ PACKAGECONFIG_append_pn-qemu-system-native = " sdl"
 # track the version of this file when it was generated. This can safely be ignored if
 # this doesn't mean anything to you.
 CONF_VERSION = "1"
+
+# Use OSTC download and sstate-cache by default. You can comment out or remove
+# those lines and use the defaults from Poky. Note that this cache is limited
+# to system configurations that are entirely re-distributable.
+INHERIT += "own-mirrors"
+SOURCE_MIRROR_URL = "https://cache.ostc-eu.org/bitbake/downloads"
+SSTATE_MIRRORS = "file://.* https://cache.ostc-eu.org/bitbake/sstate-cache/PATH;downloadfilename=PATH \n"
diff --git a/flavours/zephyr/local.conf.sample b/flavours/zephyr/local.conf.sample
index 81dbd652cd763d8f129107dba0a4b9d1f2a97aa4..43fd927b9ca71381fdccf7ebe3c9d92985f21143 100644
--- a/flavours/zephyr/local.conf.sample
+++ b/flavours/zephyr/local.conf.sample
@@ -247,3 +247,10 @@ PACKAGECONFIG_append_pn-qemu-system-native = " sdl"
 # track the version of this file when it was generated. This can safely be ignored if
 # this doesn't mean anything to you.
 CONF_VERSION = "1"
+
+# Use OSTC download and sstate-cache by default. You can comment out or remove
+# those lines and use the defaults from Poky. Note that this cache is limited
+# to system configurations that are entirely re-distributable.
+INHERIT += "own-mirrors"
+SOURCE_MIRROR_URL = "https://cache.ostc-eu.org/bitbake/downloads"
+SSTATE_MIRRORS = "file://.* https://cache.ostc-eu.org/bitbake/sstate-cache/PATH;downloadfilename=PATH \n"