diff --git a/make/defs.mk b/make/defs.mk
index dbe126ac..448254d4 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -298,9 +298,9 @@ EXE_SH                += $(wildcard *.sh *.pl *.pm *.py *.bat)
 EXE_SH                += $(patsubst %.sh.tmpl,%.sh,$(wildcard *.sh.tmpl))
 
 BUILD_SCRIPTDIR        = $(TOPDIR)/bin
-INSTALL_SCRIPTDIR      = $(EXE_PREFIX)/bin
+INSTALL_SCRIPTDIR     ?= $(EXE_PREFIX)/bin
 BUILD_SCRIPT          += $(addprefix $(BUILD_SCRIPTDIR)/,$(EXE_SH))
-INSTALLED_SCRIPT      += $(addprefix $(INSTALL_EXEDIR)/,$(EXE_SH))
+INSTALLED_SCRIPT      += $(addprefix $(INSTALL_SCRIPTDIR)/,$(EXE_SH))
 
 # -- CGI
 EXE_CGI               += $(wildcard *.cgi)