diff --git a/package/utils/spidev_test/Makefile b/package/utils/spidev_test/Makefile
index 0f288ad010..fef5c8f646 100644
--- a/package/utils/spidev_test/Makefile
+++ b/package/utils/spidev_test/Makefile
@@ -10,7 +10,6 @@ include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=spidev-test
 PKG_RELEASE:=$(LINUX_VERSION)
-PKG_FLAGS:=nonshared
 PKG_BUILD_DIR:=$(LINUX_DIR)/tools/spi-$(TARGET_DIR_NAME)
 PKG_BUILD_PARALLEL:=1
 
@@ -19,7 +18,7 @@ include $(INCLUDE_DIR)/package.mk
 define Package/spidev-test
   SECTION:=utils
   CATEGORY:=Utilities
-  DEPENDS:=+kmod-spi-dev @!IN_SDK
+  DEPENDS:=+kmod-spi-dev
   TITLE:=SPI testing utility
   VERSION:=$(LINUX_VERSION)-$(PKG_RELEASE)
   URL:=http://www.kernel.org
@@ -30,6 +29,8 @@ define Package/spidev-test/description
 endef
 
 define Build/Prepare
+	# For SDK: Sources are copied by target/sdk/Makefile's
+	# USERSPACE_UTILS(_FILES)
 	$(CP) $(LINUX_DIR)/tools/spi/* $(PKG_BUILD_DIR)/
 endef
 
diff --git a/target/sdk/Makefile b/target/sdk/Makefile
index 0606621192..be7e1ebf51 100644
--- a/target/sdk/Makefile
+++ b/target/sdk/Makefile
@@ -82,6 +82,18 @@ KERNEL_FILES_BASE := \
 
 KERNEL_FILES := $(patsubst $(TOPDIR)/%,%,$(wildcard $(addprefix $(LINUX_DIR)/,$(KERNEL_FILES_BASE))))
 
+# The kernel source hosts various userspace utilities sources.
+# These are packaged separately from the kernel and kernel modules.
+# The source has to be included here to be buildable by the SDK.
+#
+USERSPACE_UTILS_FILES := \
+	tools/build \
+	tools/scripts \
+	tools/usb/usbip \
+	tools/spi
+
+USERSPACE_FILES := $(patsubst $(TOPDIR)/%,%,$(wildcard $(addprefix $(LINUX_DIR)/,$(USERSPACE_UTILS_FILES))))
+
 all: compile
 
 $(BIN_DIR)/$(SDK_NAME).tar.xz: clean
@@ -100,8 +112,7 @@ $(BIN_DIR)/$(SDK_NAME).tar.xz: clean
 		$(SDK_DIRS) $(KERNEL_FILES) | \
 		$(TAR) -xf - -C $(SDK_BUILD_DIR)
 
-	# Copy usbip sources, this is required for the usbip userspace packages to be buildable by the SDK.
-	$(TAR) -cf - -C $(TOPDIR) $(KDIR_BASE)/tools/usb/usbip/ | \
+	$(TAR) -cf - -C $(TOPDIR) $(USERSPACE_FILES) | \
 		$(TAR) -xf - -C $(SDK_BUILD_DIR)
 
 	(cd $(SDK_BUILD_DIR); find $(STAGING_SUBDIR_HOST)/bin $(STAGING_SUBDIR_HOST)/usr/bin \