diff --git a/build_library/set_lsb_release b/build_library/set_lsb_release
index f86c968909f..7347ad6fddf 100755
--- a/build_library/set_lsb_release
+++ b/build_library/set_lsb_release
@@ -11,7 +11,7 @@ SCRIPT_ROOT=$(readlink -f $(dirname "$0")/..)
 . "${SCRIPT_ROOT}/common.sh" || exit 1
 
 # Flags
-DEFINE_string board "" "The board to build an image for."
+DEFINE_string board "${DEFAULT_BOARD}" "The board to build an image for."
 DEFINE_string root "" "The root file system to write /etc/lsb-release to."
 DEFINE_string group "" "The default update group for update_engine."
 
@@ -25,40 +25,37 @@ ROOT_FS_DIR="$FLAGS_root"
 [ -n "$ROOT_FS_DIR" ] || die "--root is required."
 [ -d "$ROOT_FS_DIR" ] || die "Root FS does not exist? ($ROOT_FS_DIR)"
 
-OS_NAME="Flatcar Container Linux by Kinvolk"
-OS_CODENAME="Oklo"
-OS_ID="flatcar"
-OS_ID_LIKE="coreos"
-OS_PRETTY_NAME="$OS_NAME $FLATCAR_VERSION (${OS_CODENAME})"
+# These variables are set in the base profile.
+eval $("portageq-${FLAGS_board}" envvar -v BRANDING_OS_\*)
+BRANDING_OS_PRETTY_NAME="${BRANDING_OS_NAME} ${FLATCAR_VERSION}"
 
 FLATCAR_APPID="{e96281a6-d1af-4bde-9a0a-97b76e56dc57}"
 
 # DISTRIB_* are the standard lsb-release names
 sudo mkdir -p "${ROOT_FS_DIR}/usr/share/flatcar" "${ROOT_FS_DIR}/etc/flatcar"
 sudo_clobber "${ROOT_FS_DIR}/usr/share/flatcar/lsb-release" <<EOF
-DISTRIB_ID="$OS_NAME"
+DISTRIB_ID="$BRANDING_OS_NAME"
 DISTRIB_RELEASE=$FLATCAR_VERSION
-DISTRIB_CODENAME="$OS_CODENAME"
-DISTRIB_DESCRIPTION="$OS_PRETTY_NAME"
+DISTRIB_DESCRIPTION="$BRANDING_OS_PRETTY_NAME"
 EOF
 sudo ln -sf "../usr/share/flatcar/lsb-release" "${ROOT_FS_DIR}/etc/lsb-release"
 
 # And the new standard, os-release
 # https://www.freedesktop.org/software/systemd/man/os-release.html
 sudo_clobber "${ROOT_FS_DIR}/usr/lib/os-release" <<EOF
-NAME="$OS_NAME"
-ID=$OS_ID
-ID_LIKE=$OS_ID_LIKE
-VERSION=$FLATCAR_VERSION
-VERSION_ID=$FLATCAR_VERSION_ID
-BUILD_ID=$FLATCAR_BUILD_ID
-SYSEXT_LEVEL=1.0
-PRETTY_NAME="$OS_PRETTY_NAME"
+NAME="$BRANDING_OS_NAME"
+ID="$BRANDING_OS_ID"
+ID_LIKE="$BRANDING_OS_ID_LIKE"
+VERSION="$FLATCAR_VERSION"
+VERSION_ID="$FLATCAR_VERSION_ID"
+BUILD_ID="$FLATCAR_BUILD_ID"
+SYSEXT_LEVEL="1.0"
+PRETTY_NAME="$BRANDING_OS_PRETTY_NAME"
 ANSI_COLOR="38;5;75"
-HOME_URL="https://flatcar.org/"
-BUG_REPORT_URL="https://issues.flatcar.org"
+HOME_URL="$BRANDING_OS_HOME_URL"
+BUG_REPORT_URL="$BRANDING_OS_BUG_REPORT_URL"
 FLATCAR_BOARD="$FLAGS_board"
-CPE_NAME="cpe:2.3:o:${OS_ID}-linux:${OS_ID}_linux:${FLATCAR_VERSION}:*:*:*:*:*:*:*"
+CPE_NAME="cpe:2.3:o:${BRANDING_OS_ID}-linux:${BRANDING_OS_ID}_linux:${FLATCAR_VERSION}:*:*:*:*:*:*:*"
 EOF
 sudo ln -sf "../usr/lib/os-release" "${ROOT_FS_DIR}/etc/os-release"
 sudo ln -sf "../../lib/os-release" "${ROOT_FS_DIR}/usr/share/flatcar/os-release"
diff --git a/changelog/changes/2026-02-23-oklo-codename.md b/changelog/changes/2026-02-23-oklo-codename.md
new file mode 100644
index 00000000000..42cc7160703
--- /dev/null
+++ b/changelog/changes/2026-02-23-oklo-codename.md
@@ -0,0 +1 @@
+- Dropped the "Oklo" release codename as it was never updated in a meaningful way.
diff --git a/sdk_container/.repo/manifests/os-release b/sdk_container/.repo/manifests/os-release
deleted file mode 100644
index 3942c3a2d95..00000000000
--- a/sdk_container/.repo/manifests/os-release
+++ /dev/null
@@ -1,6 +0,0 @@
-NAME="Flatcar Container Linux by Kinvolk"
-ID=flatcar
-ID_LIKE=coreos
-ANSI_COLOR="38;5;75"
-HOME_URL="https://flatcar.org/"
-BUG_REPORT_URL="https://issues.flatcar.org"
diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/scripts/build_packages b/sdk_container/src/third_party/coreos-overlay/coreos/scripts/build_packages
deleted file mode 120000
index c43c4e9b0c8..00000000000
--- a/sdk_container/src/third_party/coreos-overlay/coreos/scripts/build_packages
+++ /dev/null
@@ -1 +0,0 @@
-../../../../scripts/build_packages
\ No newline at end of file
diff --git a/sdk_container/src/third_party/coreos-overlay/coreos/scripts/setup_board b/sdk_container/src/third_party/coreos-overlay/coreos/scripts/setup_board
deleted file mode 120000
index 1ae2ca87e1e..00000000000
--- a/sdk_container/src/third_party/coreos-overlay/coreos/scripts/setup_board
+++ /dev/null
@@ -1 +0,0 @@
-../../../../scripts/setup_board
\ No newline at end of file
diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/make.defaults b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/make.defaults
index bf01d5e4c5b..119a31882f2 100644
--- a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/make.defaults
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/make.defaults
@@ -1,6 +1,13 @@
 # Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
 # Distributed under the terms of the GNU General Public License v2
 
+BRANDING_OS_NAME="Flatcar Container Linux by Kinvolk"
+BRANDING_OS_ID="flatcar"
+BRANDING_OS_ID_LIKE="coreos"
+BRANDING_OS_HOME_URL="https://flatcar.org"
+BRANDING_OS_BUG_REPORT_URL="https://issues.flatcar.org"
+BRANDING_OS_PRETTY_NAME="" # Set blank to override "Gentoo Linux" but set dynamically from BRANDING_OS_VERSION.
+
 # ChromeOS-specific: TESTS USE_EXPAND for autotest
 USE_EXPAND="${USE_EXPAND} TESTS"
 
@@ -134,14 +141,3 @@ MODULES_SIGN_CERT="/tmp/certs/modules.pub.pem"
 
 # enable signing kernel modules from portage
 USE="${USE} modules-sign"
-
-# Branding stuff
-BRANDING_OS_NAME="Flatcar Container Linux by Kinvolk"
-BRANDING_OS_ID="flatcar"
-BRANDING_OS_ID_LIKE="coreos"
-BRANDING_OS_HOME_URL="https://flatcar.org"
-BRANDING_OS_SUPPORT_URL="https://groups.google.com/forum/#!forum/flatcar-linux-user"
-BRANDING_OS_BUG_REPORT_URL="https://issues.flatcar.org"
-#BRANDING_OS_VERSION=
-#BRANDING_OS_VERSION_ID=
-#BRANDING_OS_PRETTY_NAME=