diff --git a/packaging/Makefile b/packaging/Makefile
index 6bcc537..bab5fad 100644
--- a/packaging/Makefile
+++ b/packaging/Makefile
@@ -49,6 +49,8 @@ sign: build-image
 	$(DOCKER_CMD) make -f Makefile.internal $@ KEYFILE=$(KEYFILE)
 %.checksum: build-image %.prepare
 	$(DOCKER_CMD) make -f Makefile.internal $@ KEYFILE=$(KEYFILE)
+%.buildshell: build-image %.prepare
+	$(DOCKER_CMD) make -f Makefile.internal $@ KEYFILE=$(KEYFILE)
 
 prepare-all: $(patsubst %,%.prepare,$(file < package-list))
 
diff --git a/packaging/Makefile.internal b/packaging/Makefile.internal
index 4495308..790e026 100644
--- a/packaging/Makefile.internal
+++ b/packaging/Makefile.internal
@@ -21,6 +21,9 @@ $(ARCH_TARGET):
 %.checksum:
 	cd packages/$* && abuild checksum
 
+%.buildshell:
+	cd packages/$* && (unset MAKEFLAGS; abuild -F -P $(TARGET) deps && bash --login)
+
 sign: $(ARCH_TARGET)
 	rm -f $(ARCH_TARGET)/APKINDEX.tar.gz
 	cd $(ARCH_TARGET) && apk index -o APKINDEX.tar.gz --rewrite-arch $(ARCH) *.apk