Set COMMON_DIR by the relative path and use "--parents" option of cp.

Author: Mine02C4

common/Makefile

@@ -3,7 +3,7 @@
 TOP           = $(shell pwd)
 OS            = $(shell uname -s)
 BUILD_DATE    = $(shell date "+%Y/%m/%d %H:%M:%S")
-COMMON_DIR    = $(TOP)/../common
+COMMON_DIR    = ../common
 GOOGLE_PROJ   = vimperator-labs
 GOOGLE	      = https://$(GOOGLE_PROJ).googlecode.com/files
 
@@ -103,7 +103,7 @@ xpi:
 		echo "locale liberator $(LOCALE) common/locale/$(LOCALE)/" >> $(XPI_PATH)/chrome.manifest; \
 	fi
 	# Copy components and modules directories
-	find $(XPI_DIRS) -follow -type f ! -name ".*" -print0 | xargs -0i $(CP) {} -t $(XPI_PATH) || true
+	find $(XPI_DIRS) -follow -type f ! -name ".*" -print0 | xargs -0i $(CP) --parents {} -t $(XPI_PATH) || true
 	# Copy all chrome files, from both commmon/ and vimperator/ folders
 	cd $(COMMON_DIR) && find $(COMMON_CHROME_DIRS) -follow -type f ! -name ".*" -print0 | xargs -0i $(CP) --parents {} -t $(XPI_PATH)/common || true
 	find $(CHROME_DIRS) -follow -type f ! -name ".*" -print0 | xargs -0i $(CP) --parents {} -t $(XPI_PATH) || true