Skip building buscribe under arm64

Also handle not setting MULTIPLATFORM properly

build

@@ -73,12 +73,11 @@ fi
 		
 for component in "${COMPONENTS[@]}"; do
 	echo "Building image for $component"
+	latest="$BASE/wubloader-$component:latest"
+	specific="$BASE/wubloader-$component:$TAG"
 	if [ -n "$MULTIPLATFORM" ]; then
 		echo "Creating multi-arch manifest"
 		"$BUILD_CMD" manifest create "wubloader-$component"
-	fi
-	latest="$BASE/wubloader-$component:latest"
-	specific="$BASE/wubloader-$component:$TAG"
 		# no way to build multi-arch in parallel, so just build amd64 first and then arm64.
 		# caching should work with both, so that'll make things less painful at least.
 		"$BUILD_CMD" build \
@@ -89,6 +88,8 @@ for component in "${COMPONENTS[@]}"; do
 			--arch amd64 \
 			"${CACHE_ARGS[@]}" \
 			.
+		# buscribe doesn't (yet?) build under arm64 due to pulling in libc-bin, skip arm64 for it
+		if [ "$component" != "buscribe ]; then
 			"$BUILD_CMD" build \
 				-f "$component/Dockerfile" \
 				-t "$latest" \
@@ -97,18 +98,26 @@ for component in "${COMPONENTS[@]}"; do
 				--arch arm64 \
 				"${CACHE_ARGS[@]}" \
 				.
+		fi
 		echo "Built image wubloader-$component:$TAG"
-	if [ -n "$MULTIPLATFORM" ]; then
 		# manifest pushes are buildah-specific. docker buildx multiplatform builds have different syntax...
 		if [ -n "$PUSH" ]; then
 			echo "Pushing tag $specific"
-			"$BUILD_CMD" manifest push --all "docker://$specific"
+			"$BUILD_CMD" manifest push --all "$specific"
 		fi
 		if [ "$PUSH" == "latest" ]; then
 			echo "Pushing tag $latest"
-			"$BUILD_CMD" manifest push --all "docker://$latest"
+			"$BUILD_CMD" manifest push --all "$latest"
 		fi
 	else
+		"$BUILD_CMD" build \
+			-f "$component/Dockerfile" \
+			-t "$latest" \
+			-t "$specific" \
+			--manifest "wubloader-$component" \
+			"${CACHE_ARGS[@]}" \
+			.
+		echo "Built image wubloader-$component:$TAG"
 		if [ -n "$PUSH" ]; then
 			echo "Pushing tag $specific"
 			"$BUILD_CMD" push "$specific"