diff --git a/debian/rules.real b/debian/rules.real
index 7d6f571c5..d62155e43 100644
--- a/debian/rules.real
+++ b/debian/rules.real
@@ -141,7 +141,7 @@ define SETUP_DIR
 	echo 'ifneq ($$(DEB_BUILD_ARCH),$$(DEB_HOST_ARCH))' >> '$(DIR)/.kernelvariables'
 	echo 'override CROSS_COMPILE = $$(DEB_HOST_GNU_TYPE)-' >> '$(DIR)/.kernelvariables'
 	echo 'endif' >> '$(DIR)/.kernelvariables'
-	cd '$(DIR)'; $(setup_env) make reportoldconfig ARCH=$(KERNEL_ARCH)
+	cd '$(DIR)'; $(setup_env) make reportoldconfig
 endef
 
 $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-kernel-package:
@@ -151,12 +151,12 @@ $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-kernel-package:
 
 $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-plain-s390-tape:
 	$(SETUP_DIR)
-	cd '$(DIR)'; $(setup_env) make prepare ARCH=$(KERNEL_ARCH) $(JOBS_ARG)
+	cd '$(DIR)'; $(setup_env) make prepare $(JOBS_ARG)
 	touch '$@'
 
 $(STAMPS_DIR)/setup-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-plain-xen:
 	$(SETUP_DIR)
-	cd '$(DIR)'; $(setup_env) make prepare ARCH=$(KERNEL_ARCH) $(JOBS_ARG)
+	cd '$(DIR)'; $(setup_env) make prepare $(JOBS_ARG)
 	touch '$@'
 
 $(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-$(TYPE): DIR=$(BUILD_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)
@@ -168,11 +168,11 @@ $(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-kernel-package:
 	touch '$@'
 
 $(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-plain-s390-tape:
-	cd '$(DIR)'; $(setup_env) make ARCH=$(KERNEL_ARCH) $(JOBS_ARG) image
+	cd '$(DIR)'; $(setup_env) make $(JOBS_ARG) image
 	touch '$@'
 
 $(STAMPS_DIR)/build-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-plain-xen:
-	cd '$(DIR)'; $(setup_env) make ARCH=$(KERNEL_ARCH) $(JOBS_ARG)
+	cd '$(DIR)'; $(setup_env) make $(JOBS_ARG)
 	python2.4 debian/bin/abicheck.py $(DIR) $(ARCH) $(SUBARCH) $(FLAVOUR)
 	touch '$@'
 
@@ -378,7 +378,7 @@ install-image-$(ARCH)-$(SUBARCH)-$(FLAVOUR)-plain-xen:
 	DH_OPTIONS= dh_installdirs -p$(PACKAGE_NAME) 'boot'
 	DH_OPTIONS= dh_installdirs -p$(MODULES_PACKAGE_NAME) 'boot'
 	cp $(DIR)/vmlinuz $(INSTALL_DIR)/vmlinuz-$(REAL_VERSION)
-	cd $(DIR); $(setup_env) make modules_install ARCH=$(KERNEL_ARCH) INSTALL_MOD_PATH=$(MODULES_PACKAGE_DIR)
+	cd $(DIR); $(setup_env) make modules_install INSTALL_MOD_PATH=$(MODULES_PACKAGE_DIR)
 	cp $(DIR)/.config $(MODULES_PACKAGE_DIR)/boot/config-$(REAL_VERSION)
 	cp $(DIR)/System.map $(MODULES_PACKAGE_DIR)/boot/System.map-$(REAL_VERSION)
 	rm $(MODULES_PACKAGE_DIR)/lib/modules/$(REAL_VERSION)/{build,source}