Little fixes.

GNUmakefile

@@ -27,14 +27,16 @@ MYOCAMLDEP := $(PWD)/generator/myocamldep.native
 
 install: all
 	rm -rf $(PREFIX)
-	mkdir -p $(PREFIX)/bin $(PREFIX)/lib $(PREFIX)/camllib
 # Copy the executable.
+	mkdir -p $(PREFIX)/bin
 	cp generator/main.native $(PREFIX)/bin/cfml
 # Copy the Coq theory.
 	cp -r src $(PREFIX)/lib
+	cd $(PREFIX)/lib && rm -f Makefile *.v.d *.glob
 # Copy the OCaml standard library (plus additions) and compile it.
+	mkdir -p $(PREFIX)/camllib
 	cp -r $(MLI) $(PREFIX)/camllib
 	cp Makefile.camllib $(PREFIX)/camllib/Makefile
 	make MAKECMJ=$(MAKECMJ) MYOCAMLDEP=$(MYOCAMLDEP) -C $(PREFIX)/camllib
-	cd $(PREFIX)/camllib && rm .depend Makefile
+	cd $(PREFIX)/camllib && rm -f .depend Makefile