diff --git a/build/tools/sdk_repo.mk b/build/tools/sdk_repo.mk
new file mode 100644
index 0000000..70356c7
--- /dev/null
+++ b/build/tools/sdk_repo.mk
@@ -0,0 +1,106 @@
+# Makefile to build the SDK repository packages.
+
+.PHONY: sdk_repo
+
+# Define the name of a package zip file to generate
+# $1=OS (e.g. linux-x86, windows, etc)
+# $2=sdk zip (e.g. out/host/linux.../android-eng-sdk.zip)
+# $3=package to create (e.g. tools, docs, etc.)
+#
+define sdk-repo-pkg-zip
+$(dir $(2))/sdk-repo-$(1)-$(3).zip
+endef
+
+# Defines the rule to build an SDK repository package by zipping all
+# the content of the given directory.
+# E.g. given a folder out/host/linux.../sdk/android-eng-sdk/tools
+# this generates an sdk-repo-linux-tools that contains tools/*
+#
+# $1=OS (e.g. linux-x86, windows, etc)
+# $2=sdk zip (e.g. out/host/linux.../android-eng-sdk.zip)
+# $3=package to create (e.g. tools, docs, etc.)
+#
+# The rule depends on the SDK zip file, which is defined by $2.
+#
+define mk-sdk-repo-pkg-1
+$(call sdk-repo-pkg-zip,$(1),$(2),$(3)): $(2)
+	@echo "Building SDK repository package $(3) from $(notdir $(2))"
+	$(hide) cd $(dir $(2)) && \
+			zip -9rq ../$(notdir $(call sdk-repo-pkg-zip,$(1),$(2),$(3))) \
+					 $(basename $(2))/*
+$(call dist-for-goals, sdk_repo, $(call sdk-repo-pkg-zip,$(1),$(2),$(3)))
+endef
+
+# Defines the rule to build an SDK repository package when the
+# package directory contains a single platform-related inner directory.
+# E.g. given a folder out/host/linux.../sdk/android-eng-sdk/samples/android-N
+# this generates an sdk-repo-linux-samples that contains android-N/*
+#
+# $1=OS (e.g. linux-x86, windows, etc)
+# $2=sdk zip (e.g. out/host/linux.../android-eng-sdk.zip)
+# $3=package to create (e.g. platforms, samples, etc.)
+#
+# The rule depends on the SDK zip file, which is defined by $2.
+#
+define mk-sdk-repo-pkg-2
+$(call sdk-repo-pkg-zip,$(1),$(2),$(3)): $(2)
+	@echo "Building SDK repository package $(3) from $(notdir $(2))"
+	$(hide) cd $(dir $(2))/$(3) && \
+			zip -9rq ../../$(notdir $(call sdk-repo-pkg-zip,$(1),$(2),$(3))) \
+					 $(basename $(2))/*
+$(call dist-for-goals, sdk_repo, $(call sdk-repo-pkg-zip,$(1),$(2),$(3)))
+endef
+
+
+SDK_REPO_DEPS :=
+
+# Rules for win_sdk
+
+ifneq ($(WIN_SDK_ZIP),)
+
+# docs, platforms and samples have nothing OS-dependent right now.
+$(eval $(call mk-sdk-repo-pkg-1,windows,$(WIN_SDK_ZIP),tools))
+$(eval $(call mk-sdk-repo-pkg-1,windows,$(WIN_SDK_ZIP),platform-tools))
+
+SDK_REPO_DEPS += \
+		$(call sdk-repo-pkg-zip,windows,$(WIN_SDK_ZIP),tools) \
+        $(call sdk-repo-pkg-zip,windows,$(WIN_SDK_ZIP),platform-tools)
+
+endif
+
+# Rules for main host sdk
+
+ifneq ($(filter sdk win_sdk,$(MAKECMDGOALS)),)
+
+$(eval $(call mk-sdk-repo-pkg-1,$(HOST_OS),$(MAIN_SDK_ZIP),tools))
+$(eval $(call mk-sdk-repo-pkg-1,$(HOST_OS),$(MAIN_SDK_ZIP),platform-tools))
+$(eval $(call mk-sdk-repo-pkg-1,$(HOST_OS),$(MAIN_SDK_ZIP),docs))
+$(eval $(call mk-sdk-repo-pkg-2,$(HOST_OS),$(MAIN_SDK_ZIP),platforms))
+$(eval $(call mk-sdk-repo-pkg-2,$(HOST_OS),$(MAIN_SDK_ZIP),samples))
+
+SDK_REPO_DEPS += \
+		$(call sdk-repo-pkg-zip,$(HOST_OS),$(MAIN_SDK_ZIP),tools) \
+		$(call sdk-repo-pkg-zip,$(HOST_OS),$(MAIN_SDK_ZIP),platform-tools) \
+		$(call sdk-repo-pkg-zip,$(HOST_OS),$(MAIN_SDK_ZIP),docs) \
+		$(call sdk-repo-pkg-zip,$(HOST_OS),$(MAIN_SDK_ZIP),platforms) \
+		$(call sdk-repo-pkg-zip,$(HOST_OS),$(MAIN_SDK_ZIP),samples) \
+
+endif
+
+# Rules for sdk addon
+
+ifneq ($(ADDON_SDK_ZIP),)
+
+# ADDON_SDK_ZIP is defined in build/core/tasks/sdk-addon.sh and is
+# already packaged correctly. All we have to do is dist it with
+# a different destination name.
+
+$(call dist-for-goals, sdk_repo, \
+	$(ADDON_SDK_ZIP):$(notdir $(call sdk-repo-pkg-zip,$(HOST_OS),$(ADDON_SDK_ZIP),addon)))
+
+endif
+
+
+sdk_repo: $(SDK_REPO_DEPS)
+	@echo "Packing of SDK repository done"
+
diff --git a/build/tools/windows_sdk.mk b/build/tools/windows_sdk.mk
index 7dc6b7f..b7cf78d 100644
--- a/build/tools/windows_sdk.mk
+++ b/build/tools/windows_sdk.mk
@@ -46,15 +46,12 @@
 	llvm-rs-cc
 
 
-# LINUX_SDK_NAME/DIR is set in build/core/Makefile
-WIN_SDK_NAME  := $(subst $(HOST_OS)-$(HOST_ARCH),windows,$(LINUX_SDK_NAME))
-WIN_SDK_DIR   := $(subst $(HOST_OS)-$(HOST_ARCH),windows,$(LINUX_SDK_DIR))
-WIN_SDK_ZIP   := $(WIN_SDK_DIR)/$(WIN_SDK_NAME).zip
+# MAIN_SDK_NAME/DIR is set in build/core/Makefile
+WIN_SDK_NAME := $(subst $(HOST_OS)-$(HOST_ARCH),windows,$(MAIN_SDK_NAME))
+WIN_SDK_DIR  := $(subst $(HOST_OS)-$(HOST_ARCH),windows,$(MAIN_SDK_DIR))
+WIN_SDK_ZIP  := $(WIN_SDK_DIR)/$(WIN_SDK_NAME).zip
 
-# Also dist $(INTERNAL_SDK_TARGET), which is the original linux sdk package.
-# INTERNAL_SDK_TARGET is defined in build/core/Makefile.
-$(call dist-for-goals, win_sdk, $(WIN_SDK_ZIP) \
-    $(INTERNAL_SDK_TARGET))
+$(call dist-for-goals, win_sdk, $(WIN_SDK_ZIP))
 
 .PHONY: win_sdk winsdk-tools
 
@@ -65,10 +62,10 @@
 endef
 
 define winsdk-info
-$(info LINUX_SDK_NAME: $(LINUX_SDK_NAME))
-$(info WIN_SDK_NAME  : $(WIN_SDK_NAME))
-$(info WIN_SDK_DIR   : $(WIN_SDK_DIR))
-$(info WIN_SDK_ZIP   : $(WIN_SDK_ZIP))
+$(info MAIN_SDK_NAME: $(MAIN_SDK_NAME))
+$(info WIN_SDK_NAME : $(WIN_SDK_NAME))
+$(info WIN_SDK_DIR  : $(WIN_SDK_DIR))
+$(info WIN_SDK_ZIP  : $(WIN_SDK_ZIP))
 endef
 
 win_sdk: $(WIN_SDK_ZIP)
@@ -83,7 +80,7 @@
 	$(call winsdk-info)
 	$(hide) rm -rf $(WIN_SDK_DIR)
 	$(hide) mkdir -p $(WIN_SDK_DIR)
-	$(hide) cp -rf $(LINUX_SDK_DIR)/$(LINUX_SDK_NAME) $(WIN_SDK_DIR)/$(WIN_SDK_NAME)
+	$(hide) cp -rf $(MAIN_SDK_DIR)/$(MAIN_SDK_NAME) $(WIN_SDK_DIR)/$(WIN_SDK_NAME)
 	$(hide) USB_DRIVER_HOOK=$(USB_DRIVER_HOOK) \
 		$(TOPDIR)development/build/tools/patch_windows_sdk.sh $(subst @,-q,$(hide)) \
 		$(WIN_SDK_DIR)/$(WIN_SDK_NAME) $(OUT_DIR) $(TOPDIR)