diff --git a/bin/build.sh b/bin/build.sh
index 2328dac..b603c55 100755
--- a/bin/build.sh
+++ b/bin/build.sh
@@ -29,6 +29,7 @@ if [[ "X${1}" = "X" ]]; then
 fi
 
 fullversion="$1"
+shift
 . ${__dirname}/_decode_version.sh
 decode "$fullversion"
 # see _decode_version for all of the magic variables now set and available for use
@@ -65,7 +66,7 @@ docker run --rm \
   > ${thislogdir}/fetch-source.log 2>&1
 
 # Build all other recipes
-for recipe in $recipes; do
+for recipe in ${1:-$recipes}; do
   # each recipe has 3 variable components:
   # - individiaul ~/.ccache directory
   # - a ~/node.tar.xz file that fetch-source has downloaded
diff --git a/bin/prepare-images.sh b/bin/prepare-images.sh
index b38d68f..12b4eca 100755
--- a/bin/prepare-images.sh
+++ b/bin/prepare-images.sh
@@ -5,7 +5,8 @@
 __dirname="$(CDPATH= cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 image_tag_pfx=unofficial-build-recipe-
 
-for recipe in $(ls ${__dirname}/../recipes/); do
+recipes=${1:-$(ls ${__dirname}/../recipes/)}
+for recipe in $recipes; do
 	docker build ${__dirname}/../recipes/${recipe}/ -t ${image_tag_pfx}${recipe} --build-arg UID=1000 --build-arg GID=1000
 done