Fixing makefile.

Author: Clément

source/Makefile

@@ -582,19 +582,19 @@ $(PROJECT_DIR)%.zip: $(PROJECT_DIR)%/*/Program.cs | $(PROJECT_DIR)/%/*/*.cs
 # Book files
 # -------------------------------
 
-$(BUILD_DIR)book.md: $(SOURCE_BOOK)
+$(BUILD_DIR)book.md:
 	pandoc $(SOURCE_BOOK) $(PANDOC_MD) -o $@
 
 #$(BUILD_DIR)book.html: $(BUILD_DIR)book.md
 #	pandoc $(SOURCE_BOOK) $(PANDOC_BOOK_HTM) -o $@
 
-$(BUILD_DIR)book.pdf: $(BUILD_DIR)book.md
+$(BUILD_DIR)book.pdf:
 	pandoc $(BUILD_DIR)book.md $(PANDOC_BOOK_PDF) -o $@
 
-$(BUILD_DIR)book.odt: $(BUILD_DIR)book.md
+$(BUILD_DIR)book.odt:
 	pandoc $(BUILD_DIR)book.md $(PANDOC_BOOK_ODT) -o $@
 
-$(BUILD_DIR)book.docx: $(BUILD_DIR)book.md
+$(BUILD_DIR)book.docx:
 	pandoc $(BUILD_DIR)book.md $(PANDOC_BOOK_DOC) -o $@
 
 # -------------------------------