diff --git a/alterator/Makefile b/alterator/Makefile
index 27d29ec..f670cf4 100644
--- a/alterator/Makefile
+++ b/alterator/Makefile
@@ -42,7 +42,7 @@ install-data:
 	install -d $(datadir)/guile/site/$(GUILE_VERSION)
 	ln -s  ../../../alterator/interfaces/guile $(datadir)/guile/site/$(GUILE_VERSION)/alterator
 	install -d $(libdir)/guile/$(GUILE_VERSION)/site-ccache
-	ln -s ../../../../lib/alterator/interfaces/guile $(libdir)/guile/$(GUILE_VERSION)/site-ccache/alterator
+	ln -s $(shell realpath --relative-to=$(libdir)/guile/$(GUILE_VERSION)/site-ccache $(ALTERATOR_LIBDIR)/interfaces/guile) $(libdir)/guile/$(GUILE_VERSION)/site-ccache/alterator
 	ln -s ../interfaces/guile $(datadir)/alterator/build/alterator
 	install -Dpm755 alteratord.init $(sysconfdir)/rc.d/init.d/alteratord
 	install -dpm755  $(sysconfdir)/alterator/menu