diff --git a/scripts/rbc-run b/scripts/rbc-run
index e2fa6d1..a0907cf 100755
--- a/scripts/rbc-run
+++ b/scripts/rbc-run
@@ -1,16 +1,15 @@
 #! /bin/bash
 # Convert and run one configuration
-# Args: <product>-<variant>
-[[ $# -eq 1 && "$1" =~ ^(.*)-(.*)$ ]] || { echo Usage: ${0##*/} PRODUCT-VARIANT >&2; exit 1; }
-declare -r product="${BASH_REMATCH[1]:-aosp_arm}"
-declare -r variant="${BASH_REMATCH[2]:-eng}"
+# Args: a product/board makefile optionally followed by additional arguments
+#       that will be passed to rbcrun.
+[[ $# -gt 0 && -f "$1" ]] || { echo "Usage: ${0##*/} product.mk [Additional rbcrun arguments]" >&2; exit 1; }
 set -eu
 declare -r output_root=${OUT_DIR:-out}
 declare -r runner="$output_root/soong/.bootstrap/bin/rbcrun"
 declare -r converter="$output_root/soong/.bootstrap/bin/mk2rbc"
 declare -r launcher=$output_root/launchers/run.rbc
-$converter -mode=write -r --outdir $output_root --launcher=$launcher $product
-printf "#TARGET_PRODUCT=$product TARGET_BUILD_VARIANT=$variant\n"
-env TARGET_PRODUCT=$product TARGET_BUILD_VARIANT=$variant \
-  $runner RBC_OUT="make,global" RBC_DEBUG="${RBC_DEBUG:-}" $launcher
+declare -r makefile=$1
+shift
+$converter -mode=write -r --outdir $output_root --launcher=$launcher $makefile
+$runner RBC_OUT="make,global" RBC_DEBUG="${RBC_DEBUG:-}" $@ $launcher