diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/amd64/README b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/amd64/README
new file mode 100644
index 0000000000..534127b07d
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/amd64/README
@@ -0,0 +1,4 @@
+This profile (and its sub-profiles) should *only* contain amd64
+architecture specific settings. Architecture independent settings should
+go under coreos/base (applies to everything) or coreos/targets/*
+(applies to the sdk, amd64-generic, etc.).
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/amd64/generic/parent b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/amd64/generic/parent
new file mode 100644
index 0000000000..f37322604b
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/amd64/generic/parent
@@ -0,0 +1 @@
+:default/linux/amd64/10.0/coreos
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/amd64/sdk/parent b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/amd64/sdk/parent
new file mode 100644
index 0000000000..ce282c2139
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/amd64/sdk/parent
@@ -0,0 +1 @@
+:default/linux/amd64/10.0
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/README b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/README
new file mode 100644
index 0000000000..596c3c6f65
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/README
@@ -0,0 +1 @@
+Profile to apply to all coreos architectures and targets.
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/README b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/README
new file mode 100644
index 0000000000..2753c6f9a7
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/README
@@ -0,0 +1,3 @@
+Profile to apply to all CoreOS "board" images. Other variants that are
+not architecture specific should inherit this profile.
+This excludes the SDK.
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/sdk/README b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/sdk/README
new file mode 100644
index 0000000000..88564a5655
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/sdk/README
@@ -0,0 +1 @@
+Profile to apply to the SDK, buildbots, etc.
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/profiles.desc b/sdk_container/src/third_party/coreos-overlay/profiles/profiles.desc
index 5d76eea29c..0eb87270f8 100644
--- a/sdk_container/src/third_party/coreos-overlay/profiles/profiles.desc
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/profiles.desc
@@ -1,2 +1,4 @@
+amd64   coreos/amd64/generic                dev
+amd64   coreos/amd64/sdk                    dev
 amd64   default/linux/amd64/10.0            dev
 amd64   default/linux/amd64/10.0/coreos     dev