diff --git a/build-setup.sh b/build-setup.sh
index fc9aaaf..4ea6355 100755
--- a/build-setup.sh
+++ b/build-setup.sh
@@ -143,17 +143,7 @@
 chown "${UID}:${GROUPS[0]}" "${xtrct_path}"
 
 # Perform overrides for specific machines as required.
-case ${target} in
-  witherspoon-tacoma)
-    DISTRO="openbmc-openpower"
-    ;;
-  rainier)
-    DISTRO="openbmc-openpower"
-    ;;
-  *)
-    echo "Unspecified machine ${target}; default to local.sample.conf values."
-    ;;
-esac
+DISTRO=${DISTRO:-}
 
 # Set build target and BitBake command
 MACHINE="${target}"