--- a/include/image.mk
+++ b/include/image.mk
@@ -371,7 +370,7 @@ define Device/Init
   KERNEL_INITRAMFS_SUFFIX = $$(KERNEL_SUFFIX)
   KERNEL_IMAGE = $$(KERNEL_PREFIX)$$(KERNEL_SUFFIX)
   KERNEL_INITRAMFS_PREFIX = $$(IMAGE_PREFIX)-initramfs
-  KERNEL_INITRAMFS_IMAGE = $$(KERNEL_INITRAMFS_PREFIX)$$(KERNEL_INITRAMFS_SUFFIX)
+  KERNEL_INITRAMFS_IMAGE = $(subst $(IMG_PREFIX_EXTRA),,$(IMG_PREFIX))-$(1)-initramfs$$(KERNEL_INITRAMFS_SUFFIX)
   KERNEL_INITRAMFS_NAME = $$(KERNEL_NAME)-initramfs
   KERNEL_INSTALL :=
   KERNEL_NAME := vmlinux
@@ -469,7 +468,6 @@ define Device/Check
   endif
 endef
 
-ifndef IB
 define Device/Build/initramfs
   $(call Device/Export,$(KDIR)/tmp/$$(KERNEL_INITRAMFS_IMAGE),$(1))
   $$(_TARGET): $$(if $$(KERNEL_INITRAMFS),$(BIN_DIR)/$$(KERNEL_INITRAMFS_IMAGE) \
@@ -479,9 +477,11 @@ define Device/Build/initramfs
   $(BIN_DIR)/$$(KERNEL_INITRAMFS_IMAGE): $(KDIR)/tmp/$$(KERNEL_INITRAMFS_IMAGE)
 	cp $$^ $$@
 
+  ifndef IB
   $(KDIR)/tmp/$$(KERNEL_INITRAMFS_IMAGE): $(KDIR)/$$(KERNEL_INITRAMFS_NAME) $(CURDIR)/Makefile $$(KERNEL_DEPENDS) image_prepare
 	@rm -f $$@
 	$$(call concat_cmd,$$(KERNEL_INITRAMFS))
+  endif
 
   $(call Device/Export,$(BUILD_DIR)/json_info_files/$$(KERNEL_INITRAMFS_IMAGE).json,$(1))
 
@@ -515,7 +515,6 @@ define Device/Build/initramfs
 	SUPPORTED_DEVICES="$$(SUPPORTED_DEVICES)" \
 	$(TOPDIR)/scripts/json_add_image_info.py $$@
 endef
-endif
 
 define Device/Build/compile
   $$(_COMPILE_TARGET): $(KDIR)/$(1)

--- a/scripts/json_overview_image_info.py
+++ b/scripts/json_overview_image_info.py
@@ -47,7 +47,7 @@ def get_initial_output(image_info):
 
 
 if output:
-    default_packages, output["arch_packages"] = run(
+    default_packages, output["arch_packages"], output["kernel_version"] = run(
         [
             "make",
             "--no-print-directory",
@@ -55,6 +55,7 @@ def get_initial_output(image_info):
             "target/linux/",
             "val.DEFAULT_PACKAGES",
             "val.ARCH_PACKAGES",
+            "val.LINUX_VERSION",
         ],
         stdout=PIPE,
         stderr=PIPE,