Debian docker seems to lack buildx?

packaging/Makefile

@@ -80,16 +80,14 @@ veryclean: clean
 build-image: check-tools .build-image.$(ARCH)
 
 .build-image.$(ARCH): $(KEYFILE)
-	docker buildx build \
-		--progress plain \
+	docker build \
 		$(DOCKER_BUILD_ARGS) \
 		--platform=linux/$(DOCKER_ARCH) \
 		-t synit-build:$(ARCH) .
 	touch $@
 
 .build-image.rust.$(ARCH): .build-image.$(ARCH)
-	docker buildx build \
-		--progress plain \
+	docker build \
 		$(DOCKER_BUILD_ARGS) \
 		--platform=linux/$(DOCKER_ARCH) \
 		-t synit-build-rust:$(ARCH) -f Dockerfile.rust .

packaging/squid/start.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
-docker buildx build -t synit-squid "$(dirname "$0")"
+docker build -t synit-squid "$(dirname "$0")"
 docker run --rm --name fetch-squid-cert synit-squid cat /etc/ssl/certs/squid-ca.pem \
        > squid-ca.pem
 docker run -it --rm \